55500090 has 32 divisors (see below), whose sum is σ = 133396416. Its totient is φ = 14778240.

The previous prime is 55500089. The next prime is 55500139. The reversal of 55500090 is 9000555.

It is a self number, because there is not a number n which added to its sum of digits gives 55500090.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38014 + ... + 39446.

It is an arithmetic number, because the mean of its divisors is an integer number (4168638).

Almost surely, 2^55500090 is an apocalyptic number.

55500090 is an abundant number, since it is smaller than the sum of its proper divisors (77896326).

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

55500090 is a wasteful number, since it uses less digits than its factorization.

55500090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734.

The product of its (nonzero) digits is 1125, while the sum is 24.

The square root of 55500090 is about 7449.8382532777. The cubic root of 55500090 is about 381.4443874786. Note that the first 3 decimals are identical.

The spelling of 55500090 in words is "fifty-five million, five hundred thousand, ninety".