25250631 has 32 divisors (see below), whose sum is σ = 40089600. Its totient is φ = 14126112.

The previous prime is 25250623. The next prime is 25250651. The reversal of 25250631 is 13605252.

It is not a de Polignac number, because 25250631 - 2³ = 25250623 is a prime.

It is a super-2 number, since 2×25250631² = 1275188731796322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25250651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54306 + ... + 54768.

It is an arithmetic number, because the mean of its divisors is an integer number (1252800).

Almost surely, 2^25250631 is an apocalyptic number.

25250631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25250631 is a deficient number, since it is larger than the sum of its proper divisors (14838969).

25250631 is an equidigital number, since it uses as much as digits as its factorization.

25250631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 25250631 is about 5025.0005970149. Note that the first 3 decimals coincide. The cubic root of 25250631 is about 293.3756592103.

Adding to 25250631 its reverse (13605252), we get a palindrome (38855883).

The spelling of 25250631 in words is "twenty-five million, two hundred fifty thousand, six hundred thirty-one".