55531225 has 6 divisors (see below), whose sum is σ = 68858750. Its totient is φ = 44424960.

The previous prime is 55531211. The next prime is 55531241. The reversal of 55531225 is 52213555.

It can be written as a sum of positive squares in 3 ways, for example, as 5631129 + 49900096 = 2373^2 + 7064^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55531225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55531193 and 55531202.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1110600 + ... + 1110649.

Almost surely, 2^55531225 is an apocalyptic number.

It is an amenable number.

55531225 is a deficient number, since it is larger than the sum of its proper divisors (13327525).

55531225 is a wasteful number, since it uses less digits than its factorization.

55531225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221259 (or 2221254 counting only the distinct ones).

The product of its digits is 7500, while the sum is 28.

The square root of 55531225 is about 7451.9276029763. The cubic root of 55531225 is about 381.5157029838.

The spelling of 55531225 in words is "fifty-five million, five hundred thirty-one thousand, two hundred twenty-five".