55121364 has 24 divisors (see below), whose sum is σ = 142907520. Its totient is φ = 18373752.

The previous prime is 55121359. The next prime is 55121389. The reversal of 55121364 is 46312155.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 255084 + ... + 255299.

It is an arithmetic number, because the mean of its divisors is an integer number (5954480).

Almost surely, 2^55121364 is an apocalyptic number.

55121364 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55121364 is an abundant number, since it is smaller than the sum of its proper divisors (87786156).

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

55121364 is a wasteful number, since it uses less digits than its factorization.

55121364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510396 (or 510388 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 55121364 is about 7424.3763374441. The cubic root of 55121364 is about 380.5747627162.

The spelling of 55121364 in words is "fifty-five million, one hundred twenty-one thousand, three hundred sixty-four".