55324815 has 32 divisors (see below), whose sum is σ = 108950016. Its totient is φ = 23345280.

The previous prime is 55324813. The next prime is 55324849. The reversal of 55324815 is 51842355.

It is not a de Polignac number, because 55324815 - 2¹ = 55324813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55324813) 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, 18901 + ... + 21630.

It is an arithmetic number, because the mean of its divisors is an integer number (3404688).

Almost surely, 2^55324815 is an apocalyptic number.

55324815 is a deficient number, since it is larger than the sum of its proper divisors (53625201).

55324815 is a wasteful number, since it uses less digits than its factorization.

55324815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40559.

The product of its digits is 24000, while the sum is 33.

The square root of 55324815 is about 7438.0652726364. The cubic root of 55324815 is about 381.0424171401.

The spelling of 55324815 in words is "fifty-five million, three hundred twenty-four thousand, eight hundred fifteen".