25255591 has 16 divisors (see below), whose sum is σ = 27748224. Its totient is φ = 22892544.

The previous prime is 25255561. The next prime is 25255609. The reversal of 25255591 is 19555252.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25255591 - 2⁷ = 25255463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25255501) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 58111 + ... + 58543.

It is an arithmetic number, because the mean of its divisors is an integer number (1734264).

Almost surely, 2^25255591 is an apocalyptic number.

25255591 is a deficient number, since it is larger than the sum of its proper divisors (2492633).

25255591 is a wasteful number, since it uses less digits than its factorization.

25255591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570.

The product of its digits is 22500, while the sum is 34.

The square root of 25255591 is about 5025.4941050607. The cubic root of 25255591 is about 293.3948672848.

The spelling of 25255591 in words is "twenty-five million, two hundred fifty-five thousand, five hundred ninety-one".