25431097 has 4 divisors (see below), whose sum is σ = 25587280. Its totient is φ = 25274916.

The previous prime is 25431073. The next prime is 25431151. The reversal of 25431097 is 79013452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25431097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25431397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77847 + ... + 78172.

It is an arithmetic number, because the mean of its divisors is an integer number (6396820).

Almost surely, 2^25431097 is an apocalyptic number.

It is an amenable number.

25431097 is a deficient number, since it is larger than the sum of its proper divisors (156183).

25431097 is a wasteful number, since it uses less digits than its factorization.

25431097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156182.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 25431097 is about 5042.9254406545. The cubic root of 25431097 is about 294.0729183440.

The spelling of 25431097 in words is "twenty-five million, four hundred thirty-one thousand, ninety-seven".