56571155 has 16 divisors (see below), whose sum is σ = 72122400. Its totient is φ = 42450432.

The previous prime is 56571149. The next prime is 56571157. The reversal of 56571155 is 55117565.

It is a cyclic number.

It is not a de Polignac number, because 56571155 - 2⁴ = 56571139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56571157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28712 + ... + 30618.

It is an arithmetic number, because the mean of its divisors is an integer number (4507650).

Almost surely, 2^56571155 is an apocalyptic number.

56571155 is a deficient number, since it is larger than the sum of its proper divisors (15551245).

56571155 is a wasteful number, since it uses less digits than its factorization.

56571155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278.

The product of its digits is 26250, while the sum is 35.

The square root of 56571155 is about 7521.3798601055. The cubic root of 56571155 is about 383.8825301672.

The spelling of 56571155 in words is "fifty-six million, five hundred seventy-one thousand, one hundred fifty-five".