55855272 has 32 divisors (see below), whose sum is σ = 152333280. Its totient is φ = 16925760.

The previous prime is 55855271. The next prime is 55855297. The reversal of 55855272 is 27255855.

It is a super-2 number, since 2×55855272² = 6239622820387968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55855272.

It is not an unprimeable number, because it can be changed into a prime (55855271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105523 + ... + 106050.

It is an arithmetic number, because the mean of its divisors is an integer number (4760415).

Almost surely, 2^55855272 is an apocalyptic number.

It is an amenable number.

55855272 is an abundant number, since it is smaller than the sum of its proper divisors (96478008).

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

55855272 is a wasteful number, since it uses less digits than its factorization.

55855272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211593 (or 211589 counting only the distinct ones).

The product of its digits is 140000, while the sum is 39.

The square root of 55855272 is about 7473.6384713204. The cubic root of 55855272 is about 382.2563632795.

The spelling of 55855272 in words is "fifty-five million, eight hundred fifty-five thousand, two hundred seventy-two".