55904918 has 4 divisors (see below), whose sum is σ = 83857380. Its totient is φ = 27952458.

The previous prime is 55904911. The next prime is 55904921. The reversal of 55904918 is 81940955.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81940955 = 5 ⋅16388191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55904911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13976228 + ... + 13976231.

It is an arithmetic number, because the mean of its divisors is an integer number (20964345).

Almost surely, 2^55904918 is an apocalyptic number.

55904918 is a deficient number, since it is larger than the sum of its proper divisors (27952462).

55904918 is a wasteful number, since it uses less digits than its factorization.

55904918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27952461.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 55904918 is about 7476.9591412552. The cubic root of 55904918 is about 382.3695837443.

The spelling of 55904918 in words is "fifty-five million, nine hundred four thousand, nine hundred eighteen".