25885531 has 4 divisors (see below), whose sum is σ = 29583472. Its totient is φ = 22187592.

The previous prime is 25885529. The next prime is 25885537. The reversal of 25885531 is 13558852.

25885531 = 1920² + 1921² + ... + 1926².

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

It is not a de Polignac number, because 25885531 - 2¹ = 25885529 is a prime.

It is a super-2 number, since 2×25885531² = 1340121430303922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25885537) 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, 1848960 + ... + 1848973.

It is an arithmetic number, because the mean of its divisors is an integer number (7395868).

Almost surely, 2^25885531 is an apocalyptic number.

25885531 is a deficient number, since it is larger than the sum of its proper divisors (3697941).

25885531 is an equidigital number, since it uses as much as digits as its factorization.

25885531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3697940.

The product of its digits is 48000, while the sum is 37.

The square root of 25885531 is about 5087.7825228679. The cubic root of 25885531 is about 295.8142057505.

The spelling of 25885531 in words is "twenty-five million, eight hundred eighty-five thousand, five hundred thirty-one".