25342531 has 6 divisors (see below), whose sum is σ = 26187396. Its totient is φ = 24524100.

The previous prime is 25342519. The next prime is 25342567. The reversal of 25342531 is 13524352.

It is a de Polignac number, because none of the positive numbers 2^k-25342531 is a prime.

It is a super-2 number, since 2×25342531² = 1284487754971922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25342496 and 25342505.

It is not an unprimeable number, because it can be changed into a prime (25342501) 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, 12225 + ... + 14146.

It is an arithmetic number, because the mean of its divisors is an integer number (4364566).

Almost surely, 2^25342531 is an apocalyptic number.

25342531 is a deficient number, since it is larger than the sum of its proper divisors (844865).

25342531 is an equidigital number, since it uses as much as digits as its factorization.

25342531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26433 (or 26402 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 25342531 is about 5034.1365694625. The cubic root of 25342531 is about 293.7311431384.

Adding to 25342531 its reverse (13524352), we get a palindrome (38866883).

The spelling of 25342531 in words is "twenty-five million, three hundred forty-two thousand, five hundred thirty-one".