55851138 has 24 divisors (see below), whose sum is σ = 138298368. Its totient is φ = 15957432.

The previous prime is 55851121. The next prime is 55851157. The reversal of 55851138 is 83115855.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221506 + ... + 221757.

It is an arithmetic number, because the mean of its divisors is an integer number (5762432).

Almost surely, 2^55851138 is an apocalyptic number.

55851138 is an abundant number, since it is smaller than the sum of its proper divisors (82447230).

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

55851138 is a wasteful number, since it uses less digits than its factorization.

55851138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443278 (or 443275 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 55851138 is about 7473.3618940876. The cubic root of 55851138 is about 382.2469324371.

The spelling of 55851138 in words is "fifty-five million, eight hundred fifty-one thousand, one hundred thirty-eight".