56809155 has 32 divisors (see below), whose sum is σ = 103650624. Its totient is φ = 26320896.

The previous prime is 56809139. The next prime is 56809157. The reversal of 56809155 is 55190865.

It is not a de Polignac number, because 56809155 - 2⁴ = 56809139 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (56809157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5254 + ... + 11883.

It is an arithmetic number, because the mean of its divisors is an integer number (3239082).

Almost surely, 2^56809155 is an apocalyptic number.

56809155 is a deficient number, since it is larger than the sum of its proper divisors (46841469).

56809155 is a wasteful number, since it uses less digits than its factorization.

56809155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17175.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 56809155 is about 7537.1848192810. The cubic root of 56809155 is about 384.4201198934.

The spelling of 56809155 in words is "fifty-six million, eight hundred nine thousand, one hundred fifty-five".