56815293 has 4 divisors (see below), whose sum is σ = 75753728. Its totient is φ = 37876860.

The previous prime is 56815273. The next prime is 56815303. The reversal of 56815293 is 39251865.

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 not a de Polignac number, because 56815293 - 2¹⁰ = 56814269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56815273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9469213 + ... + 9469218.

It is an arithmetic number, because the mean of its divisors is an integer number (18938432).

Almost surely, 2^56815293 is an apocalyptic number.

It is an amenable number.

56815293 is a deficient number, since it is larger than the sum of its proper divisors (18938435).

56815293 is a wasteful number, since it uses less digits than its factorization.

56815293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18938434.

The product of its digits is 64800, while the sum is 39.

The square root of 56815293 is about 7537.5919894884. The cubic root of 56815293 is about 384.4339644092.

The spelling of 56815293 in words is "fifty-six million, eight hundred fifteen thousand, two hundred ninety-three".