55312725 has 24 divisors (see below), whose sum is σ = 98486752. Its totient is φ = 27230400.

The previous prime is 55312717. The next prime is 55312729. The reversal of 55312725 is 52721355.

It is not a de Polignac number, because 55312725 - 2³ = 55312717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55312692 and 55312701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55312729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27391 + ... + 29340.

Almost surely, 2^55312725 is an apocalyptic number.

It is an amenable number.

55312725 is a deficient number, since it is larger than the sum of its proper divisors (43174027).

55312725 is a wasteful number, since it uses less digits than its factorization.

55312725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56757 (or 56752 counting only the distinct ones).

The product of its digits is 10500, while the sum is 30.

The square root of 55312725 is about 7437.2525168909. The cubic root of 55312725 is about 381.0146590209.

It can be divided in two parts, 5531 and 2725, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 55312725 in words is "fifty-five million, three hundred twelve thousand, seven hundred twenty-five".