56145559 has 4 divisors (see below), whose sum is σ = 57066040. Its totient is φ = 55225080.

The previous prime is 56145547. The next prime is 56145587. The reversal of 56145559 is 95554165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56145559 - 2⁵ = 56145527 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 (56145059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460149 + ... + 460270.

It is an arithmetic number, because the mean of its divisors is an integer number (14266510).

Almost surely, 2^56145559 is an apocalyptic number.

56145559 is a deficient number, since it is larger than the sum of its proper divisors (920481).

56145559 is an equidigital number, since it uses as much as digits as its factorization.

56145559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920480.

The product of its digits is 135000, while the sum is 40.

The square root of 56145559 is about 7493.0340316857. The cubic root of 56145559 is about 382.9174311346.

The spelling of 56145559 in words is "fifty-six million, one hundred forty-five thousand, five hundred fifty-nine".