55915506 has 24 divisors (see below), whose sum is σ = 125059584. Its totient is φ = 18037080.

The previous prime is 55915501. The next prime is 55915511. The reversal of 55915506 is 60551955.

It is an interprime number because it is at equal distance from previous prime (55915501) and next prime (55915511).

It is a super-2 number, since 2×55915506² = 6253087622472072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55915501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49546 + ... + 50661.

It is an arithmetic number, because the mean of its divisors is an integer number (5210816).

Almost surely, 2^55915506 is an apocalyptic number.

55915506 is an abundant number, since it is smaller than the sum of its proper divisors (69144078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55915506 is a wasteful number, since it uses less digits than its factorization.

55915506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100246 (or 100243 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 36.

The square root of 55915506 is about 7477.6671495862. The cubic root of 55915506 is about 382.3937215944.

The spelling of 55915506 in words is "fifty-five million, nine hundred fifteen thousand, five hundred six".