25831297 has 4 divisors (see below), whose sum is σ = 25893076. Its totient is φ = 25769520.

The previous prime is 25831259. The next prime is 25831301. The reversal of 25831297 is 79213852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10784656 + 15046641 = 3284^2 + 3879^2 .

It is a cyclic number.

It is not a de Polignac number, because 25831297 - 2¹¹ = 25829249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25831237) 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, 30258 + ... + 31099.

It is an arithmetic number, because the mean of its divisors is an integer number (6473269).

Almost surely, 2^25831297 is an apocalyptic number.

It is an amenable number.

25831297 is a deficient number, since it is larger than the sum of its proper divisors (61779).

25831297 is an equidigital number, since it uses as much as digits as its factorization.

25831297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61778.

The product of its digits is 30240, while the sum is 37.

The square root of 25831297 is about 5082.4499013763. The cubic root of 25831297 is about 295.6074698591.

The spelling of 25831297 in words is "twenty-five million, eight hundred thirty-one thousand, two hundred ninety-seven".