56531157 has 8 divisors (see below), whose sum is σ = 75656160. Its totient is φ = 37546800.

The previous prime is 56531149. The next prime is 56531191. The reversal of 56531157 is 75113565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56531157 - 2³ = 56531149 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56531107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34219 + ... + 35832.

It is an arithmetic number, because the mean of its divisors is an integer number (9457020).

Almost surely, 2^56531157 is an apocalyptic number.

It is an amenable number.

56531157 is a deficient number, since it is larger than the sum of its proper divisors (19125003).

56531157 is a wasteful number, since it uses less digits than its factorization.

56531157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70323.

The product of its digits is 15750, while the sum is 33.

The square root of 56531157 is about 7518.7204363509. The cubic root of 56531157 is about 383.7920355584.

It can be divided in two parts, 56 and 531157, that multiplied together give a palindrome (29744792).

The spelling of 56531157 in words is "fifty-six million, five hundred thirty-one thousand, one hundred fifty-seven".