25724231 has 8 divisors (see below), whose sum is σ = 27922944. Its totient is φ = 23556960.

The previous prime is 25724227. The next prime is 25724267. The reversal of 25724231 is 13242752.

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

It is a cyclic number.

It is not a de Polignac number, because 25724231 - 2² = 25724227 is a prime.

It is a super-2 number, since 2×25724231² = 1323472121082722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25724231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25727231) 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, 6140 + ... + 9441.

It is an arithmetic number, because the mean of its divisors is an integer number (3490368).

Almost surely, 2^25724231 is an apocalyptic number.

25724231 is a deficient number, since it is larger than the sum of its proper divisors (2198713).

25724231 is a wasteful number, since it uses less digits than its factorization.

25724231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15721.

The product of its digits is 3360, while the sum is 26.

The square root of 25724231 is about 5071.9060519690. The cubic root of 25724231 is about 295.1984913310.

Adding to 25724231 its reverse (13242752), we get a palindrome (38966983).

The spelling of 25724231 in words is "twenty-five million, seven hundred twenty-four thousand, two hundred thirty-one".