55530615 has 16 divisors (see below), whose sum is σ = 101541888. Its totient is φ = 25385376.

The previous prime is 55530613. The next prime is 55530649. The reversal of 55530615 is 51603555.

It is not a de Polignac number, because 55530615 - 2¹ = 55530613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55530611) 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, 264327 + ... + 264536.

It is an arithmetic number, because the mean of its divisors is an integer number (6346368).

Almost surely, 2^55530615 is an apocalyptic number.

55530615 is a deficient number, since it is larger than the sum of its proper divisors (46011273).

55530615 is a wasteful number, since it uses less digits than its factorization.

55530615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528878.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 55530615 is about 7451.8866738565. The cubic root of 55530615 is about 381.5143060194.

The spelling of 55530615 in words is "fifty-five million, five hundred thirty thousand, six hundred fifteen".