55133772 has 48 divisors (see below), whose sum is σ = 131588352. Its totient is φ = 17962560.

The previous prime is 55133759. The next prime is 55133791. The reversal of 55133772 is 27733155.

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 15 ways as a sum of consecutive naturals, for example, 138678 + ... + 139074.

It is an arithmetic number, because the mean of its divisors is an integer number (2741424).

Almost surely, 2^55133772 is an apocalyptic number.

It is an amenable number.

55133772 is an abundant number, since it is smaller than the sum of its proper divisors (76454580).

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

55133772 is a wasteful number, since it uses less digits than its factorization.

55133772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 636 counting only the distinct ones).

The product of its digits is 22050, while the sum is 33.

The square root of 55133772 is about 7425.2119161678. The cubic root of 55133772 is about 380.6033167832.

The spelling of 55133772 in words is "fifty-five million, one hundred thirty-three thousand, seven hundred seventy-two".