55905025 has 18 divisors (see below), whose sum is σ = 76201286. Its totient is φ = 40656000.

The previous prime is 55905023. The next prime is 55905067. The reversal of 55905025 is 52050955.

It can be written as a sum of positive squares in 3 ways, for example, as 14070001 + 41835024 = 3751^2 + 6468^2 .

It is not a de Polignac number, because 55905025 - 2¹ = 55905023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55905023) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6216 + ... + 12265.

Almost surely, 2^55905025 is an apocalyptic number.

55905025 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55905025 is a deficient number, since it is larger than the sum of its proper divisors (20296261).

55905025 is a wasteful number, since it uses less digits than its factorization.

55905025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18513 (or 18497 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 55905025 is about 7476.9662965671. The cubic root of 55905025 is about 382.3698276914.

The spelling of 55905025 in words is "fifty-five million, nine hundred five thousand, twenty-five".