25115560 has 32 divisors (see below), whose sum is σ = 56838600. Its totient is φ = 9987840.

The previous prime is 25115539. The next prime is 25115581. The reversal of 25115560 is 6551152.

It is an interprime number because it is at equal distance from previous prime (25115539) and next prime (25115581).

It can be written as a sum of positive squares in 4 ways, for example, as 4919524 + 20196036 = 2218^2 + 4494^2 .

It is a super-2 number, since 2×25115560² = 1261582708227200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5506 + ... + 8974.

Almost surely, 2^25115560 is an apocalyptic number.

25115560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25115560 is an abundant number, since it is smaller than the sum of its proper divisors (31723040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25115560 is a wasteful number, since it uses less digits than its factorization.

25115560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661 (or 3657 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 25115560 is about 5011.5426766615. The cubic root of 25115560 is about 292.8516140709.

The spelling of 25115560 in words is "twenty-five million, one hundred fifteen thousand, five hundred sixty".