25140231 has 6 divisors (see below), whose sum is σ = 36313680. Its totient is φ = 16760148.

The previous prime is 25140223. The next prime is 25140239. The reversal of 25140231 is 13204152.

It is an interprime number because it is at equal distance from previous prime (25140223) and next prime (25140239).

It is not a de Polignac number, because 25140231 - 2³ = 25140223 is a prime.

It is a super-2 number, since 2×25140231² = 1264062429466722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25140239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1396671 + ... + 1396688.

It is an arithmetic number, because the mean of its divisors is an integer number (6052280).

Almost surely, 2^25140231 is an apocalyptic number.

25140231 is a deficient number, since it is larger than the sum of its proper divisors (11173449).

25140231 is a wasteful number, since it uses less digits than its factorization.

25140231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793365 (or 2793362 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 25140231 is about 5014.0034902261. The cubic root of 25140231 is about 292.9474720141.

Adding to 25140231 its reverse (13204152), we get a palindrome (38344383).

The spelling of 25140231 in words is "twenty-five million, one hundred forty thousand, two hundred thirty-one".