56520213 has 4 divisors (see below), whose sum is σ = 75360288. Its totient is φ = 37680140.

The previous prime is 56520209. The next prime is 56520229. The reversal of 56520213 is 31202565.

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 56520213 - 2² = 56520209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56520253) 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, 9420033 + ... + 9420038.

It is an arithmetic number, because the mean of its divisors is an integer number (18840072).

Almost surely, 2^56520213 is an apocalyptic number.

It is an amenable number.

56520213 is a deficient number, since it is larger than the sum of its proper divisors (18840075).

56520213 is a wasteful number, since it uses less digits than its factorization.

56520213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18840074.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 56520213 is about 7517.9926177139. The cubic root of 56520213 is about 383.7672675583.

Adding to 56520213 its reverse (31202565), we get a palindrome (87722778).

The spelling of 56520213 in words is "fifty-six million, five hundred twenty thousand, two hundred thirteen".