25552555 has 24 divisors (see below), whose sum is σ = 35789472. Its totient is φ = 17155584.

The previous prime is 25552493. The next prime is 25552561. The reversal of 25552555 is 55525552.

It is not a de Polignac number, because 25552555 - 2⁷ = 25552427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25552555.

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, 186447 + ... + 186583.

It is an arithmetic number, because the mean of its divisors is an integer number (1491228).

Almost surely, 2^25552555 is an apocalyptic number.

25552555 is a deficient number, since it is larger than the sum of its proper divisors (10236917).

25552555 is an equidigital number, since it uses as much as digits as its factorization.

25552555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 222 counting only the distinct ones).

The product of its digits is 62500, while the sum is 34.

The square root of 25552555 is about 5054.9535111611. The cubic root of 25552555 is about 294.5403355520.

The spelling of 25552555 in words is "twenty-five million, five hundred fifty-two thousand, five hundred fifty-five".