55563915 has 32 divisors (see below), whose sum is σ = 97459200. Its totient is φ = 26808320.

The previous prime is 55563901. The next prime is 55563919. The reversal of 55563915 is 51936555.

It is not a de Polignac number, because 55563915 - 2¹¹ = 55561867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55563919) 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, 38731 + ... + 40139.

It is an arithmetic number, because the mean of its divisors is an integer number (3045600).

Almost surely, 2^55563915 is an apocalyptic number.

55563915 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55563915 is a deficient number, since it is larger than the sum of its proper divisors (41895285).

55563915 is a wasteful number, since it uses less digits than its factorization.

55563915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667.

The product of its digits is 101250, while the sum is 39.

The square root of 55563915 is about 7454.1206724871. The cubic root of 55563915 is about 381.5905515748.

The spelling of 55563915 in words is "fifty-five million, five hundred sixty-three thousand, nine hundred fifteen".