55442585 has 16 divisors (see below), whose sum is σ = 73265472. Its totient is φ = 39940800.

The previous prime is 55442579. The next prime is 55442587. The reversal of 55442585 is 58524455.

It is not a de Polignac number, because 55442585 - 2²⁰ = 54394009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55442587) 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, 1175 + ... + 10595.

It is an arithmetic number, because the mean of its divisors is an integer number (4579092).

Almost surely, 2^55442585 is an apocalyptic number.

55442585 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55442585 is a deficient number, since it is larger than the sum of its proper divisors (17822887).

55442585 is a wasteful number, since it uses less digits than its factorization.

55442585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9544.

The product of its digits is 160000, while the sum is 38.

The square root of 55442585 is about 7445.9777732679. The cubic root of 55442585 is about 381.3126006674.

The spelling of 55442585 in words is "fifty-five million, four hundred forty-two thousand, five hundred eighty-five".