25242631 has 2 divisors, whose sum is σ = 25242632. Its totient is φ = 25242630.

The previous prime is 25242611. The next prime is 25242643. The reversal of 25242631 is 13624252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25242631 - 2¹¹ = 25240583 is a prime.

It is a super-2 number, since 2×25242631² = 1274380839604322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25242596 and 25242605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25242611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12621315 + 12621316.

It is an arithmetic number, because the mean of its divisors is an integer number (12621316).

Almost surely, 2^25242631 is an apocalyptic number.

25242631 is a deficient number, since it is larger than the sum of its proper divisors (1).

25242631 is an equidigital number, since it uses as much as digits as its factorization.

25242631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 25242631 is about 5024.2045141495. The cubic root of 25242631 is about 293.3446731440.

Adding to 25242631 its reverse (13624252), we get a palindrome (38866883).

The spelling of 25242631 in words is "twenty-five million, two hundred forty-two thousand, six hundred thirty-one".