25715500 has 24 divisors (see below), whose sum is σ = 56163744. Its totient is φ = 10286000.

The previous prime is 25715479. The next prime is 25715507. The reversal of 25715500 is 551752.

It is a happy number.

It is a super-2 number, since 2×25715500² = 1322573880500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (25715507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25216 + ... + 26215.

It is an arithmetic number, because the mean of its divisors is an integer number (2340156).

Almost surely, 2^25715500 is an apocalyptic number.

25715500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25715500 is an abundant number, since it is smaller than the sum of its proper divisors (30448244).

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

25715500 is a wasteful number, since it uses less digits than its factorization.

25715500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51450 (or 51438 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 25715500 is about 5071.0452571437. The cubic root of 25715500 is about 295.1650900128.

The spelling of 25715500 in words is "twenty-five million, seven hundred fifteen thousand, five hundred".