Search a number
-
+
51394591 = 3713710139
BaseRepresentation
bin1100010000001…
…1100000011111
310120201010010101
43010003200133
5101124111331
65033321531
71162563313
oct304034037
9116633111
1051394591
1127013576
12152662a7
13a856101
146b7bb43
1547a3061
hex310381f

51394591 has 8 divisors (see below), whose sum is σ = 53174160. Its totient is φ = 49635648.

The previous prime is 51394579. The next prime is 51394613. The reversal of 51394591 is 19549315.

It is a happy number.

51394591 is a nontrivial binomial coefficient, being equal to C(10139, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51394591 - 27 = 51394463 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 51394591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51394501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 10138.

It is an arithmetic number, because the mean of its divisors is an integer number (6646770).

Almost surely, 251394591 is an apocalyptic number.

51394591 is the 10138-th triangular number.

51394591 is the 3380-th centered nonagonal number.

51394591 is a deficient number, since it is larger than the sum of its proper divisors (1779569).

51394591 is a wasteful number, since it uses less digits than its factorization.

51394591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10313.

The product of its digits is 24300, while the sum is 37.

The square root of 51394591 is about 7169.0020923417. The cubic root of 51394591 is about 371.7969345914.

It can be divided in two parts, 5139 and 4591, that added together give a triangular number (9730 = T139).

The spelling of 51394591 in words is "fifty-one million, three hundred ninety-four thousand, five hundred ninety-one".

Divisors: 1 37 137 5069 10139 375143 1389043 51394591