56521155 has 8 divisors (see below), whose sum is σ = 90433872. Its totient is φ = 30144608.

The previous prime is 56521151. The next prime is 56521177. The reversal of 56521155 is 55112565.

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 56521155 - 2² = 56521151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56521151) 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, 1884024 + ... + 1884053.

It is an arithmetic number, because the mean of its divisors is an integer number (11304234).

Almost surely, 2^56521155 is an apocalyptic number.

56521155 is a deficient number, since it is larger than the sum of its proper divisors (33912717).

56521155 is a wasteful number, since it uses less digits than its factorization.

56521155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768085.

The product of its digits is 7500, while the sum is 30.

The square root of 56521155 is about 7518.0552671552. The cubic root of 56521155 is about 383.7693995788.

The spelling of 56521155 in words is "fifty-six million, five hundred twenty-one thousand, one hundred fifty-five".