25431198 has 24 divisors (see below), whose sum is σ = 54870984. Its totient is φ = 7811280.

The previous prime is 25431163. The next prime is 25431199. The reversal of 25431198 is 89113452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25431199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44253 + ... + 44823.

It is an arithmetic number, because the mean of its divisors is an integer number (2286291).

Almost surely, 2^25431198 is an apocalyptic number.

25431198 is an abundant number, since it is smaller than the sum of its proper divisors (29439786).

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

25431198 is an equidigital number, since it uses as much as digits as its factorization.

25431198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 589 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 25431198 is about 5042.9354546732. The cubic root of 25431198 is about 294.0733076485.

It can be divided in two parts, 2543 and 1198, that added together give a triangular number (3741 = T₈₆).

The spelling of 25431198 in words is "twenty-five million, four hundred thirty-one thousand, one hundred ninety-eight".