55500558 has 32 divisors (see below), whose sum is σ = 118506240. Its totient is φ = 17277120.

The previous prime is 55500527. The next prime is 55500607. The reversal of 55500558 is 85500555.

It is a super-3 number, since 3×55500558³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

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, 4666 + ... + 11522.

It is an arithmetic number, because the mean of its divisors is an integer number (3703320).

Almost surely, 2^55500558 is an apocalyptic number.

55500558 is an abundant number, since it is smaller than the sum of its proper divisors (63005682).

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

55500558 is a wasteful number, since it uses less digits than its factorization.

55500558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6952.

The product of its (nonzero) digits is 25000, while the sum is 33.

The square root of 55500558 is about 7449.8696632894. The cubic root of 55500558 is about 381.4454596418.

The spelling of 55500558 in words is "fifty-five million, five hundred thousand, five hundred fifty-eight".