56415131 has 4 divisors (see below), whose sum is σ = 56566752. Its totient is φ = 56263512.

The previous prime is 56415119. The next prime is 56415157. The reversal of 56415131 is 13151465.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56415131 - 2¹⁰ = 56414107 is a prime.

It is a super-2 number, since 2×56415131² = 6365334011494322, 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 56415131.

It is not an unprimeable number, because it can be changed into a prime (56415101) 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, 75251 + ... + 75996.

It is an arithmetic number, because the mean of its divisors is an integer number (14141688).

Almost surely, 2^56415131 is an apocalyptic number.

56415131 is a deficient number, since it is larger than the sum of its proper divisors (151621).

56415131 is a wasteful number, since it uses less digits than its factorization.

56415131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151620.

The product of its digits is 1800, while the sum is 26.

The square root of 56415131 is about 7511.0006656903. Note that the first 3 decimals coincide. The cubic root of 56415131 is about 383.5292875058.

Adding to 56415131 its reverse (13151465), we get a palindrome (69566596).

The spelling of 56415131 in words is "fifty-six million, four hundred fifteen thousand, one hundred thirty-one".