53158681 has 9 divisors (see below), whose sum is σ = 55746271. Its totient is φ = 50687032.

The previous prime is 53158669. The next prime is 53158687. The reversal of 53158681 is 18685135.

The square root of 53158681 is 7291.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2975625 + 50183056 = 1725^2 + 7084^2 .

It is not a de Polignac number, because 53158681 - 2⁵ = 53158649 is a prime.

It is a super-2 number, since 2×53158681² = 5651690731319522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53158681.

It is not an unprimeable number, because it can be changed into a prime (53158687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 167535 + ... + 167851.

Almost surely, 2^53158681 is an apocalyptic number.

53158681 is the 7291-st square number.

53158681 is the 3646-th centered octagonal number.

It is an amenable number.

53158681 is a deficient number, since it is larger than the sum of its proper divisors (2587590).

53158681 is an frugal number, since it uses more digits than its factorization.

53158681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 340 counting only the distinct ones).

The product of its digits is 28800, while the sum is 37.

The cubic root of 53158681 is about 376.0030768761.

The spelling of 53158681 in words is "fifty-three million, one hundred fifty-eight thousand, six hundred eighty-one".