55623915 has 48 divisors (see below), whose sum is σ = 105906528. Its totient is φ = 27910656.

The previous prime is 55623907. The next prime is 55623923. The reversal of 55623915 is 51932655.

55623915 is a `hidden beast` number, since 5 + 562 + 3 + 91 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (55623907) and next prime (55623923).

It is not a de Polignac number, because 55623915 - 2³ = 55623907 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 55623915.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19309 + ... + 22001.

It is an arithmetic number, because the mean of its divisors is an integer number (2206386).

Almost surely, 2^55623915 is an apocalyptic number.

55623915 is a deficient number, since it is larger than the sum of its proper divisors (50282613).

55623915 is a wasteful number, since it uses less digits than its factorization.

55623915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730 (or 2718 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 55623915 is about 7458.1442061682. The cubic root of 55623915 is about 381.7278540964.

The spelling of 55623915 in words is "fifty-five million, six hundred twenty-three thousand, nine hundred fifteen".