25719231 has 4 divisors (see below), whose sum is σ = 34292312. Its totient is φ = 17146152.

The previous prime is 25719229. The next prime is 25719241. The reversal of 25719231 is 13291752.

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

It is not a de Polignac number, because 25719231 - 2¹ = 25719229 is a prime.

It is a super-2 number, since 2×25719231² = 1322957686462722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25719241) 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, 4286536 + ... + 4286541.

It is an arithmetic number, because the mean of its divisors is an integer number (8573078).

Almost surely, 2^25719231 is an apocalyptic number.

25719231 is a deficient number, since it is larger than the sum of its proper divisors (8573081).

25719231 is an equidigital number, since it uses as much as digits as its factorization.

25719231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8573080.

The product of its digits is 3780, while the sum is 30.

The square root of 25719231 is about 5071.4131166767. The cubic root of 25719231 is about 295.1793642533.

The spelling of 25719231 in words is "twenty-five million, seven hundred nineteen thousand, two hundred thirty-one".