55904181 has 8 divisors (see below), whose sum is σ = 74592960. Its totient is φ = 37242432.

The previous prime is 55904179. The next prime is 55904201. The reversal of 55904181 is 18140955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55904181 - 2¹ = 55904179 is a prime.

It is a super-2 number, since 2×55904181² = 6250554906561522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55904111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300 + ... + 10653.

It is an arithmetic number, because the mean of its divisors is an integer number (9324120).

Almost surely, 2^55904181 is an apocalyptic number.

It is an amenable number.

55904181 is a deficient number, since it is larger than the sum of its proper divisors (18688779).

55904181 is a wasteful number, since it uses less digits than its factorization.

55904181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13515.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 55904181 is about 7476.9098563511. The cubic root of 55904181 is about 382.3679034651.

The spelling of 55904181 in words is "fifty-five million, nine hundred four thousand, one hundred eighty-one".