55117984 has 24 divisors (see below), whose sum is σ = 109892160. Its totient is φ = 27208896.

The previous prime is 55117957. The next prime is 55117987. The reversal of 55117984 is 48971155.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55117987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8374 + ... + 13429.

It is an arithmetic number, because the mean of its divisors is an integer number (4578840).

Almost surely, 2^55117984 is an apocalyptic number.

It is an amenable number.

55117984 is a deficient number, since it is larger than the sum of its proper divisors (54774176).

55117984 is a wasteful number, since it uses less digits than its factorization.

55117984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21892 (or 21884 counting only the distinct ones).

The product of its digits is 50400, while the sum is 40.

The square root of 55117984 is about 7424.1487054072. The cubic root of 55117984 is about 380.5669837058.

The spelling of 55117984 in words is "fifty-five million, one hundred seventeen thousand, nine hundred eighty-four".