55518744 has 32 divisors (see below), whose sum is σ = 139392000. Its totient is φ = 18426912.

The previous prime is 55518733. The next prime is 55518761. The reversal of 55518744 is 44781555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897 + ... + 10575.

It is an arithmetic number, because the mean of its divisors is an integer number (4356000).

Almost surely, 2^55518744 is an apocalyptic number.

It is an amenable number.

55518744 is an abundant number, since it is smaller than the sum of its proper divisors (83873256).

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

55518744 is a wasteful number, since it uses less digits than its factorization.

55518744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9927 (or 9923 counting only the distinct ones).

The product of its digits is 112000, while the sum is 39.

The square root of 55518744 is about 7451.0901215862. The cubic root of 55518744 is about 381.4871181394.

The spelling of 55518744 in words is "fifty-five million, five hundred eighteen thousand, seven hundred forty-four".