25541531 has 6 divisors (see below), whose sum is σ = 27132660. Its totient is φ = 24038816.

The previous prime is 25541521. The next prime is 25541533. The reversal of 25541531 is 13514552.

It is not a de Polignac number, because 25541531 - 2¹⁰ = 25540507 is a prime.

It is a super-2 number, since 2×25541531² = 1304739611647922, 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 25541531.

It is not an unprimeable number, because it can be changed into a prime (25541533) 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, 43901 + ... + 44478.

It is an arithmetic number, because the mean of its divisors is an integer number (4522110).

Almost surely, 2^25541531 is an apocalyptic number.

25541531 is a deficient number, since it is larger than the sum of its proper divisors (1591129).

25541531 is an equidigital number, since it uses as much as digits as its factorization.

25541531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88413 (or 88396 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 25541531 is about 5053.8629779605. The cubic root of 25541531 is about 294.4979721468.

The spelling of 25541531 in words is "twenty-five million, five hundred forty-one thousand, five hundred thirty-one".