25231990 has 16 divisors (see below), whose sum is σ = 51905952. Its totient is φ = 8650944.

The previous prime is 25231937. The next prime is 25231993. The reversal of 25231990 is 9913252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25231993) 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, 180159 + ... + 180298.

It is an arithmetic number, because the mean of its divisors is an integer number (3244122).

Almost surely, 2^25231990 is an apocalyptic number.

25231990 is an abundant number, since it is smaller than the sum of its proper divisors (26673962).

25231990 is a wasteful number, since it uses less digits than its factorization.

25231990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360471.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 25231990 is about 5023.1454289120. The cubic root of 25231990 is about 293.3034476554.

The spelling of 25231990 in words is "twenty-five million, two hundred thirty-one thousand, nine hundred ninety".