56115081 has 27 divisors (see below), whose sum is σ = 89487853. Its totient is φ = 33859320.

The previous prime is 56115071. The next prime is 56115083. The reversal of 56115081 is 18051165.

The square root of 56115081 is 7491.

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

It is a de Polignac number, because none of the positive numbers 2^k-56115081 is a prime.

It is a super-2 number, since 2×56115081² = 6297804631273122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56115083) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 247090 + ... + 247316.

Almost surely, 2^56115081 is an apocalyptic number.

56115081 is the 7491-st square number.

56115081 is the 3746-th centered octagonal number.

It is an amenable number.

56115081 is a deficient number, since it is larger than the sum of its proper divisors (33372772).

56115081 is a wasteful number, since it uses less digits than its factorization.

56115081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The cubic root of 56115081 is about 382.8481310863.

It can be divided in two parts, 561 and 15081, that multiplied together give a triangular number (8460441 = T₄₁₁₃).

The spelling of 56115081 in words is "fifty-six million, one hundred fifteen thousand, eighty-one".