56145551 has 16 divisors (see below), whose sum is σ = 73685760. Its totient is φ = 41446080.

The previous prime is 56145547. The next prime is 56145587. The reversal of 56145551 is 15554165.

56145551 = 158² + 159² + ... + 556².

It is a cyclic number.

It is not a de Polignac number, because 56145551 - 2² = 56145547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56145151) 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, 17726 + ... + 20651.

It is an arithmetic number, because the mean of its divisors is an integer number (4605360).

Almost surely, 2^56145551 is an apocalyptic number.

56145551 is a deficient number, since it is larger than the sum of its proper divisors (17540209).

56145551 is a wasteful number, since it uses less digits than its factorization.

56145551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38414.

The product of its digits is 15000, while the sum is 32.

The square root of 56145551 is about 7493.0334978565. The cubic root of 56145551 is about 382.9174129477.

The spelling of 56145551 in words is "fifty-six million, one hundred forty-five thousand, five hundred fifty-one".