Search a number
-
+
53491 = 149359
BaseRepresentation
bin1101000011110011
32201101011
431003303
53202431
61051351
7311644
oct150363
981334
1053491
1137209
1226b57
131b469
14156cb
1510cb1
hexd0f3

53491 has 4 divisors (see below), whose sum is σ = 54000. Its totient is φ = 52984.

The previous prime is 53479. The next prime is 53503. The reversal of 53491 is 19435.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (53479) and next prime (53503).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-53491 is a prime.

It is a super-2 number, since 2×534912 = 5722574162, which contains 22 as substring.

It is a Duffinian number.

53491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (53401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31 + ... + 328.

It is an arithmetic number, because the mean of its divisors is an integer number (13500).

253491 is an apocalyptic number.

53491 is a deficient number, since it is larger than the sum of its proper divisors (509).

53491 is a wasteful number, since it uses less digits than its factorization.

53491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508.

The product of its digits is 540, while the sum is 22.

The square root of 53491 is about 231.2812141096. The cubic root of 53491 is about 37.6784971671.

It can be divided in two parts, 534 and 91, that added together give a 4-th power (625 = 54).

The spelling of 53491 in words is "fifty-three thousand, four hundred ninety-one".

Divisors: 1 149 359 53491