55231272 has 24 divisors (see below), whose sum is σ = 149584890. Its totient is φ = 18410400.

The previous prime is 55231261. The next prime is 55231273. The reversal of 55231272 is 27213255.

It can be written as a sum of positive squares in only one way, i.e., 33942276 + 21288996 = 5826^2 + 4614^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (55231273) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 383479 + ... + 383622.

Almost surely, 2^55231272 is an apocalyptic number.

It is an amenable number.

55231272 is an abundant number, since it is smaller than the sum of its proper divisors (94353618).

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

55231272 is a wasteful number, since it uses less digits than its factorization.

55231272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767113 (or 767106 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 55231272 is about 7431.7744852760. The cubic root of 55231272 is about 380.8275409370.

The spelling of 55231272 in words is "fifty-five million, two hundred thirty-one thousand, two hundred seventy-two".