55218968 has 16 divisors (see below), whose sum is σ = 118326480. Its totient is φ = 23665248.

The previous prime is 55218931. The next prime is 55218971. The reversal of 55218968 is 86981255.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 492971 + ... + 493082.

It is an arithmetic number, because the mean of its divisors is an integer number (7395405).

Almost surely, 2^55218968 is an apocalyptic number.

It is an amenable number.

55218968 is an abundant number, since it is smaller than the sum of its proper divisors (63107512).

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

55218968 is a wasteful number, since it uses less digits than its factorization.

55218968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986066 (or 986062 counting only the distinct ones).

The product of its digits is 172800, while the sum is 44.

The square root of 55218968 is about 7430.9466422523. The cubic root of 55218968 is about 380.7992595553.

The spelling of 55218968 in words is "fifty-five million, two hundred eighteen thousand, nine hundred sixty-eight".