25530500 has 24 divisors (see below), whose sum is σ = 55759704. Its totient is φ = 10212000.

The previous prime is 25530493. The next prime is 25530511. The reversal of 25530500 is 503552.

It can be written as a sum of positive squares in 4 ways, for example, as 6885376 + 18645124 = 2624^2 + 4318^2 .

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 25031 + ... + 26030.

It is an arithmetic number, because the mean of its divisors is an integer number (2323321).

Almost surely, 2^25530500 is an apocalyptic number.

25530500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25530500 is an abundant number, since it is smaller than the sum of its proper divisors (30229204).

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

25530500 is a wasteful number, since it uses less digits than its factorization.

25530500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51080 (or 51068 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 25530500 is about 5052.7715167025. The cubic root of 25530500 is about 294.4555696388.

The spelling of 25530500 in words is "twenty-five million, five hundred thirty thousand, five hundred".