55945218 has 32 divisors (see below), whose sum is σ = 128154240. Its totient is φ = 15949440.

The previous prime is 55945217. The next prime is 55945247. The reversal of 55945218 is 81254955.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55945217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22728 + ... + 25068.

It is an arithmetic number, because the mean of its divisors is an integer number (4004820).

Almost surely, 2^55945218 is an apocalyptic number.

55945218 is an abundant number, since it is smaller than the sum of its proper divisors (72209022).

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

55945218 is a wasteful number, since it uses less digits than its factorization.

55945218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922.

The product of its digits is 72000, while the sum is 39.

The square root of 55945218 is about 7479.6536016048. The cubic root of 55945218 is about 382.4614408565.

The spelling of 55945218 in words is "fifty-five million, nine hundred forty-five thousand, two hundred eighteen".