55686725 has 6 divisors (see below), whose sum is σ = 69051570. Its totient is φ = 44549360.

The previous prime is 55686707. The next prime is 55686731. The reversal of 55686725 is 52768655.

55686725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 124609 + 55562116 = 353^2 + 7454^2 .

It is not a de Polignac number, because 55686725 - 2¹² = 55682629 is a prime.

It is a super-2 number, since 2×55686725² = 6202022682451250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1113710 + ... + 1113759.

It is an arithmetic number, because the mean of its divisors is an integer number (11508595).

Almost surely, 2^55686725 is an apocalyptic number.

It is an amenable number.

55686725 is a deficient number, since it is larger than the sum of its proper divisors (13364845).

55686725 is a wasteful number, since it uses less digits than its factorization.

55686725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227479 (or 2227474 counting only the distinct ones).

The product of its digits is 504000, while the sum is 44.

The square root of 55686725 is about 7462.3538511652. The cubic root of 55686725 is about 381.8714812129.

The spelling of 55686725 in words is "fifty-five million, six hundred eighty-six thousand, seven hundred twenty-five".