56315081 has 4 divisors (see below), whose sum is σ = 56366352. Its totient is φ = 56263812.

The previous prime is 56315053. The next prime is 56315089. The reversal of 56315081 is 18051365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56315081 is a prime.

It is a super-2 number, since 2×56315081² = 6342776696073122, 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 (56315089) 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, 23951 + ... + 26196.

It is an arithmetic number, because the mean of its divisors is an integer number (14091588).

Almost surely, 2^56315081 is an apocalyptic number.

It is an amenable number.

56315081 is a deficient number, since it is larger than the sum of its proper divisors (51271).

56315081 is a wasteful number, since it uses less digits than its factorization.

56315081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51270.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 56315081 is about 7504.3374790850. The cubic root of 56315081 is about 383.3024286784.

The spelling of 56315081 in words is "fifty-six million, three hundred fifteen thousand, eighty-one".