55709725 has 24 divisors (see below), whose sum is σ = 73164960. Its totient is φ = 42006720.

The previous prime is 55709699. The next prime is 55709737. The reversal of 55709725 is 52790755.

It is not a de Polignac number, because 55709725 - 2⁷ = 55709597 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, 30282 + ... + 32068.

It is an arithmetic number, because the mean of its divisors is an integer number (3048540).

Almost surely, 2^55709725 is an apocalyptic number.

It is an amenable number.

55709725 is a deficient number, since it is larger than the sum of its proper divisors (17455235).

55709725 is a wasteful number, since it uses less digits than its factorization.

55709725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869 (or 1864 counting only the distinct ones).

The product of its (nonzero) digits is 110250, while the sum is 40.

The square root of 55709725 is about 7463.8947607801. The cubic root of 55709725 is about 381.9240481107.

The spelling of 55709725 in words is "fifty-five million, seven hundred nine thousand, seven hundred twenty-five".