25566113 has 8 divisors (see below), whose sum is σ = 27229608. Its totient is φ = 23920384.

The previous prime is 25566097. The next prime is 25566119. The reversal of 25566113 is 31166552.

It can be written as a sum of positive squares in 4 ways, for example, as 5914624 + 19651489 = 2432^2 + 4433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25566113 - 2⁴ = 25566097 is a prime.

It is a super-2 number, since 2×25566113² = 1307252267857538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25566119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406 + ... + 7287.

It is an arithmetic number, because the mean of its divisors is an integer number (3403701).

Almost surely, 2^25566113 is an apocalyptic number.

It is an amenable number.

25566113 is a deficient number, since it is larger than the sum of its proper divisors (1663495).

25566113 is a wasteful number, since it uses less digits than its factorization.

25566113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8883.

The product of its digits is 5400, while the sum is 29.

The square root of 25566113 is about 5056.2943941191. The cubic root of 25566113 is about 294.5924199951.

The spelling of 25566113 in words is "twenty-five million, five hundred sixty-six thousand, one hundred thirteen".