55558625 has 8 divisors (see below), whose sum is σ = 69337320. Its totient is φ = 44446800.

The previous prime is 55558619. The next prime is 55558631. The reversal of 55558625 is 52685555.

It is an interprime number because it is at equal distance from previous prime (55558619) and next prime (55558631).

It can be written as a sum of positive squares in 4 ways, for example, as 309136 + 55249489 = 556^2 + 7433^2 .

It is not a de Polignac number, because 55558625 - 2⁴ = 55558609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222110 + ... + 222359.

It is an arithmetic number, because the mean of its divisors is an integer number (8667165).

Almost surely, 2^55558625 is an apocalyptic number.

It is an amenable number.

55558625 is a deficient number, since it is larger than the sum of its proper divisors (13778695).

55558625 is an equidigital number, since it uses as much as digits as its factorization.

55558625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444484 (or 444474 counting only the distinct ones).

The product of its digits is 300000, while the sum is 41.

The square root of 55558625 is about 7453.7658267482. The cubic root of 55558625 is about 381.5784413286.

The spelling of 55558625 in words is "fifty-five million, five hundred fifty-eight thousand, six hundred twenty-five".