56236002521 has 4 divisors (see below), whose sum is σ = 56781983232. Its totient is φ = 55690021812.

The previous prime is 56236002509. The next prime is 56236002539. The reversal of 56236002521 is 12520063265.

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 not a de Polignac number, because 56236002521 - 2¹⁸ = 56235740377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56236002721) 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, 272990201 + ... + 272990406.

It is an arithmetic number, because the mean of its divisors is an integer number (14195495808).

Almost surely, 2^56236002521 is an apocalyptic number.

It is an amenable number.

56236002521 is a deficient number, since it is larger than the sum of its proper divisors (545980711).

56236002521 is a wasteful number, since it uses less digits than its factorization.

56236002521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545980710.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 56236002521 its reverse (12520063265), we get a palindrome (68756065786).

The spelling of 56236002521 in words is "fifty-six billion, two hundred thirty-six million, two thousand, five hundred twenty-one".