25516959 has 16 divisors (see below), whose sum is σ = 38234112. Its totient is φ = 15019488.

The previous prime is 25516957. The next prime is 25516961. The reversal of 25516959 is 95961552.

It is an interprime number because it is at equal distance from previous prime (25516957) and next prime (25516961).

It is not a de Polignac number, because 25516959 - 2¹ = 25516957 is a prime.

It is a super-2 number, since 2×25516959² = 1302230393215362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25516959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25516951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13327 + ... + 15120.

It is an arithmetic number, because the mean of its divisors is an integer number (2389632).

Almost surely, 2^25516959 is an apocalyptic number.

25516959 is a deficient number, since it is larger than the sum of its proper divisors (12717153).

25516959 is a wasteful number, since it uses less digits than its factorization.

25516959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28486.

The product of its digits is 121500, while the sum is 42.

The square root of 25516959 is about 5051.4313813017. The cubic root of 25516959 is about 294.4035021379.

The spelling of 25516959 in words is "twenty-five million, five hundred sixteen thousand, nine hundred fifty-nine".