25431197 has 8 divisors (see below), whose sum is σ = 27877152. Its totient is φ = 23007600.

The previous prime is 25431163. The next prime is 25431199. The reversal of 25431197 is 79113452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-25431197 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 3158 + ... + 7799.

It is an arithmetic number, because the mean of its divisors is an integer number (3484644).

Almost surely, 2^25431197 is an apocalyptic number.

It is an amenable number.

25431197 is a deficient number, since it is larger than the sum of its proper divisors (2445955).

25431197 is a wasteful number, since it uses less digits than its factorization.

25431197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11179.

The product of its digits is 7560, while the sum is 32.

The square root of 25431197 is about 5042.9353555246. The cubic root of 25431197 is about 294.0733037940.

The spelling of 25431197 in words is "twenty-five million, four hundred thirty-one thousand, one hundred ninety-seven".