56157523 has 4 divisors (see below), whose sum is σ = 57969088. Its totient is φ = 54345960.

The previous prime is 56157509. The next prime is 56157547. The reversal of 56157523 is 32575165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56157523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56157503) 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, 905736 + ... + 905797.

It is an arithmetic number, because the mean of its divisors is an integer number (14492272).

Almost surely, 2^56157523 is an apocalyptic number.

56157523 is a deficient number, since it is larger than the sum of its proper divisors (1811565).

56157523 is a wasteful number, since it uses less digits than its factorization.

56157523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811564.

The product of its digits is 31500, while the sum is 34.

The square root of 56157523 is about 7493.8323306570. The cubic root of 56157523 is about 382.9446276981.

It can be divided in two parts, 56 and 157523, that multiplied together give a palindrome (8821288).

The spelling of 56157523 in words is "fifty-six million, one hundred fifty-seven thousand, five hundred twenty-three".