56213523 has 6 divisors (see below), whose sum is σ = 81197324. Its totient is φ = 37475676.

The previous prime is 56213497. The next prime is 56213527. The reversal of 56213523 is 32531265.

56213523 is a `hidden beast` number, since 5 + 621 + 35 + 2 + 3 = 666.

It is not a de Polignac number, because 56213523 - 2¹⁷ = 56082451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56213527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3122965 + ... + 3122982.

Almost surely, 2^56213523 is an apocalyptic number.

56213523 is a deficient number, since it is larger than the sum of its proper divisors (24983801).

56213523 is a wasteful number, since it uses less digits than its factorization.

56213523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6245953 (or 6245950 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 56213523 is about 7497.5678056287. The cubic root of 56213523 is about 383.0718755639.

Adding to 56213523 its reverse (32531265), we get a palindrome (88744788).

The spelling of 56213523 in words is "fifty-six million, two hundred thirteen thousand, five hundred twenty-three".