55000025 has 12 divisors (see below), whose sum is σ = 69136572. Its totient is φ = 43395840.

The previous prime is 55000013. The next prime is 55000027. The reversal of 55000025 is 52000055.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 6739216 + 48260809 = 2596^2 + 6947^2 .

It is not a de Polignac number, because 55000025 - 2¹⁴ = 54983641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54999967 and 55000012.

It is not an unprimeable number, because it can be changed into a prime (55000027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13244 + ... + 16893.

It is an arithmetic number, because the mean of its divisors is an integer number (5761381).

Almost surely, 2^55000025 is an apocalyptic number.

It is an amenable number.

55000025 is a deficient number, since it is larger than the sum of its proper divisors (14136547).

55000025 is a wasteful number, since it uses less digits than its factorization.

55000025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30220 (or 30215 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 17.

The square root of 55000025 is about 7416.2001725951. The cubic root of 55000025 is about 380.2953036966.

The spelling of 55000025 in words is "fifty-five million, twenty-five", and thus it is an aban number and an uban number.