25025631 has 4 divisors (see below), whose sum is σ = 33367512. Its totient is φ = 16683752.

The previous prime is 25025629. The next prime is 25025687. The reversal of 25025631 is 13652052.

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 25025631 - 2¹ = 25025629 is a prime.

It is a super-2 number, since 2×25025631² = 1252564413896322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25024631) 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, 4170936 + ... + 4170941.

It is an arithmetic number, because the mean of its divisors is an integer number (8341878).

Almost surely, 2^25025631 is an apocalyptic number.

25025631 is a deficient number, since it is larger than the sum of its proper divisors (8341881).

25025631 is an equidigital number, since it uses as much as digits as its factorization.

25025631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8341880.

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

The square root of 25025631 is about 5002.5624433884. The cubic root of 25025631 is about 292.5016670224.

Adding to 25025631 its reverse (13652052), we get a palindrome (38677683).

The spelling of 25025631 in words is "twenty-five million, twenty-five thousand, six hundred thirty-one".