25500140 has 24 divisors (see below), whose sum is σ = 53706240. Its totient is φ = 10170368.

The previous prime is 25500131. The next prime is 25500149. The reversal of 25500140 is 4100552.

It is an interprime number because it is at equal distance from previous prime (25500131) and next prime (25500149).

It is not an unprimeable number, because it can be changed into a prime (25500149) 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, 5996 + ... + 9324.

It is an arithmetic number, because the mean of its divisors is an integer number (2237760).

Almost surely, 2^25500140 is an apocalyptic number.

25500140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25500140 is an abundant number, since it is smaller than the sum of its proper divisors (28206100).

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

25500140 is a wasteful number, since it uses less digits than its factorization.

25500140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 25500140 is about 5049.7663312276. The cubic root of 25500140 is about 294.3388045014.

Adding to 25500140 its reverse (4100552), we get a palindrome (29600692).

The spelling of 25500140 in words is "twenty-five million, five hundred thousand, one hundred forty".