55031225 has 24 divisors (see below), whose sum is σ = 71292312. Its totient is φ = 42099200.

The previous prime is 55031191. The next prime is 55031237. The reversal of 55031225 is 52213055.

It can be written as a sum of positive squares in 12 ways, for example, as 42471289 + 12559936 = 6517^2 + 3544^2 .

It is not a de Polignac number, because 55031225 - 2¹⁰ = 55030201 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55031225.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53819 + ... + 54831.

It is an arithmetic number, because the mean of its divisors is an integer number (2970513).

Almost surely, 2^55031225 is an apocalyptic number.

It is an amenable number.

55031225 is a deficient number, since it is larger than the sum of its proper divisors (16261087).

55031225 is a wasteful number, since it uses less digits than its factorization.

55031225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117 (or 1112 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 55031225 is about 7418.3033774577. The cubic root of 55031225 is about 380.3672004553.

The spelling of 55031225 in words is "fifty-five million, thirty-one thousand, two hundred twenty-five".