55212164 has 24 divisors (see below), whose sum is σ = 110678400. Its totient is φ = 23607936.

The previous prime is 55212127. The next prime is 55212173. The reversal of 55212164 is 46121255.

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 7 ways as a sum of consecutive naturals, for example, 11612 + ... + 15660.

It is an arithmetic number, because the mean of its divisors is an integer number (4611600).

Almost surely, 2^55212164 is an apocalyptic number.

It is an amenable number.

55212164 is an abundant number, since it is smaller than the sum of its proper divisors (55466236).

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

55212164 is a wasteful number, since it uses less digits than its factorization.

55212164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547 (or 4545 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 55212164 is about 7430.4888129920. The cubic root of 55212164 is about 380.7836184047.

Subtracting from 55212164 its reverse (46121255), we obtain a palindrome (9090909).

The spelling of 55212164 in words is "fifty-five million, two hundred twelve thousand, one hundred sixty-four".