55554990 has 32 divisors (see below), whose sum is σ = 135596160. Its totient is φ = 14563104.

The previous prime is 55554953. The next prime is 55555001. The reversal of 55554990 is 9945555.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13924 + ... + 17463.

It is an arithmetic number, because the mean of its divisors is an integer number (4237380).

Almost surely, 2^55554990 is an apocalyptic number.

55554990 is an abundant number, since it is smaller than the sum of its proper divisors (80041170).

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

55554990 is a wasteful number, since it uses less digits than its factorization.

55554990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31456.

The product of its (nonzero) digits is 202500, while the sum is 42.

The square root of 55554990 is about 7453.5219862827. The cubic root of 55554990 is about 381.5701193811.

The spelling of 55554990 in words is "fifty-five million, five hundred fifty-four thousand, nine hundred ninety".