25330631 has 2 divisors, whose sum is σ = 25330632. Its totient is φ = 25330630.

The previous prime is 25330609. The next prime is 25330633. The reversal of 25330631 is 13603352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25330631 - 2¹⁰ = 25329607 is a prime.

It is a super-2 number, since 2×25330631² = 1283281733716322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 25330633, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 25330597 and 25330606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25330633) 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 as a sum of consecutive naturals, namely, 12665315 + 12665316.

It is an arithmetic number, because the mean of its divisors is an integer number (12665316).

Almost surely, 2^25330631 is an apocalyptic number.

25330631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25330631 is an equidigital number, since it uses as much as digits as its factorization.

25330631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 25330631 is about 5032.9545000924. The cubic root of 25330631 is about 293.6851605193.

Adding to 25330631 its reverse (13603352), we get a palindrome (38933983).

The spelling of 25330631 in words is "twenty-five million, three hundred thirty thousand, six hundred thirty-one".