56531155 has 8 divisors (see below), whose sum is σ = 67933152. Its totient is φ = 45161088.

The previous prime is 56531149. The next prime is 56531191. The reversal of 56531155 is 55113565.

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

It is a cyclic number.

It is not a de Polignac number, because 56531155 - 2¹¹ = 56529107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3894 + ... + 11323.

It is an arithmetic number, because the mean of its divisors is an integer number (8491644).

Almost surely, 2^56531155 is an apocalyptic number.

56531155 is a deficient number, since it is larger than the sum of its proper divisors (11401997).

56531155 is a wasteful number, since it uses less digits than its factorization.

56531155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15965.

The product of its digits is 11250, while the sum is 31.

The square root of 56531155 is about 7518.7203033495. The cubic root of 56531155 is about 383.7920310324.

The spelling of 56531155 in words is "fifty-six million, five hundred thirty-one thousand, one hundred fifty-five".