25732531 has 4 divisors (see below), whose sum is σ = 28071864. Its totient is φ = 23393200.

The previous prime is 25732523. The next prime is 25732549. The reversal of 25732531 is 13523752.

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

It is a cyclic number.

It is not a de Polignac number, because 25732531 - 2³ = 25732523 is a prime.

It is a super-2 number, since 2×25732531² = 1324326303331922, 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 25732531.

It is not an unprimeable number, because it can be changed into a prime (25730531) 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, 1169650 + ... + 1169671.

It is an arithmetic number, because the mean of its divisors is an integer number (7017966).

Almost surely, 2^25732531 is an apocalyptic number.

25732531 is a deficient number, since it is larger than the sum of its proper divisors (2339333).

25732531 is a wasteful number, since it uses less digits than its factorization.

25732531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339332.

The product of its digits is 6300, while the sum is 28.

The square root of 25732531 is about 5072.7242188000. The cubic root of 25732531 is about 295.2302368087.

The spelling of 25732531 in words is "twenty-five million, seven hundred thirty-two thousand, five hundred thirty-one".