55131325 has 12 divisors (see below), whose sum is σ = 68656320. Its totient is φ = 43915760.

The previous prime is 55131319. The next prime is 55131337. The reversal of 55131325 is 52313155.

It is a de Polignac number, because none of the positive numbers 2^k-55131325 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 55131325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1362 + ... + 10588.

It is an arithmetic number, because the mean of its divisors is an integer number (5721360).

Almost surely, 2^55131325 is an apocalyptic number.

It is an amenable number.

55131325 is a deficient number, since it is larger than the sum of its proper divisors (13524995).

55131325 is a wasteful number, since it uses less digits than its factorization.

55131325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9476 (or 9471 counting only the distinct ones).

The product of its digits is 2250, while the sum is 25.

The square root of 55131325 is about 7425.0471378975. The cubic root of 55131325 is about 380.5976859327.

The spelling of 55131325 in words is "fifty-five million, one hundred thirty-one thousand, three hundred twenty-five".