56523911 has 4 divisors (see below), whose sum is σ = 56590272. Its totient is φ = 56457552.

The previous prime is 56523889. The next prime is 56523923. The reversal of 56523911 is 11932565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11932565 = 5 ⋅2386513.

It is a cyclic number.

It is not a de Polignac number, because 56523911 - 2⁶ = 56523847 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 (56523211) 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, 31886 + ... + 33611.

It is an arithmetic number, because the mean of its divisors is an integer number (14147568).

Almost surely, 2^56523911 is an apocalyptic number.

56523911 is a deficient number, since it is larger than the sum of its proper divisors (66361).

56523911 is an equidigital number, since it uses as much as digits as its factorization.

56523911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66360.

The product of its digits is 8100, while the sum is 32.

The square root of 56523911 is about 7518.2385570026. The cubic root of 56523911 is about 383.7756370739.

The spelling of 56523911 in words is "fifty-six million, five hundred twenty-three thousand, nine hundred eleven".