55178725 has 24 divisors (see below), whose sum is σ = 81601920. Its totient is φ = 36189120.

The previous prime is 55178713. The next prime is 55178731. The reversal of 55178725 is 52787155.

It is not a de Polignac number, because 55178725 - 2²⁵ = 21624293 is a prime.

It is a congruent number.

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, 2830 + ... + 10879.

It is an arithmetic number, because the mean of its divisors is an integer number (3400080).

Almost surely, 2^55178725 is an apocalyptic number.

It is an amenable number.

55178725 is a deficient number, since it is larger than the sum of its proper divisors (26423195).

55178725 is a wasteful number, since it uses less digits than its factorization.

55178725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13749 (or 13744 counting only the distinct ones).

The product of its digits is 98000, while the sum is 40.

The square root of 55178725 is about 7428.2383510493. The cubic root of 55178725 is about 380.7067295821.

The spelling of 55178725 in words is "fifty-five million, one hundred seventy-eight thousand, seven hundred twenty-five".