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51425011 = 1146110141
BaseRepresentation
bin1100010000101…
…0111011110011
310120202122212001
43010022323303
5101131100021
65034114431
71163051101
oct304127363
9116678761
1051425011
1127034410
121527ba17
13a866c01
146b88c71
1547ac091
hex310aef3

51425011 has 8 divisors (see below), whose sum is σ = 56227248. Its totient is φ = 46644000.

The previous prime is 51425009. The next prime is 51425041. The reversal of 51425011 is 11052415.

51425011 is a nontrivial binomial coefficient, being equal to C(10142, 2).

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

It is a 5-Lehmer number, since φ(51425011) divides (51425011-1)5.

It is a cyclic number.

It is not a de Polignac number, because 51425011 - 21 = 51425009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51425011.

It is not an unprimeable number, because it can be changed into a prime (51425041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 10141.

It is an arithmetic number, because the mean of its divisors is an integer number (7028406).

Almost surely, 251425011 is an apocalyptic number.

51425011 is the 10141-st triangular number and also the 5071-st hexagonal number.

51425011 is the 3381-st centered nonagonal number.

51425011 is a deficient number, since it is larger than the sum of its proper divisors (4802237).

51425011 is a wasteful number, since it uses less digits than its factorization.

51425011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 51425011 is about 7171.1234126879. The cubic root of 51425011 is about 371.8702745533.

Adding to 51425011 its reverse (11052415), we get a palindrome (62477426).

It can be divided in two parts, 5142 and 5011, that added together give a triangular number (10153 = T142).

The spelling of 51425011 in words is "fifty-one million, four hundred twenty-five thousand, eleven".

Divisors: 1 11 461 5071 10141 111551 4675001 51425011