55387222 has 16 divisors (see below), whose sum is σ = 90784512. Its totient is φ = 25134120.

The previous prime is 55387219. The next prime is 55387229. The reversal of 55387222 is 22278355.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55387229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14263 + ... + 17725.

It is an arithmetic number, because the mean of its divisors is an integer number (5674032).

Almost surely, 2^55387222 is an apocalyptic number.

55387222 is a deficient number, since it is larger than the sum of its proper divisors (35397290).

55387222 is a wasteful number, since it uses less digits than its factorization.

55387222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203.

The product of its digits is 33600, while the sum is 34.

The square root of 55387222 is about 7442.2592000010. The cubic root of 55387222 is about 381.1856366488.

The spelling of 55387222 in words is "fifty-five million, three hundred eighty-seven thousand, two hundred twenty-two".