25240331 has 2 divisors, whose sum is σ = 25240332. Its totient is φ = 25240330.

The previous prime is 25240321. The next prime is 25240333. The reversal of 25240331 is 13304252.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25240331 - 2¹⁰ = 25239307 is a prime.

It is a super-2 number, since 2×25240331² = 1274148617979122, which contains 22 as substring.

Together with 25240333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25240333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12620165 + 12620166.

It is an arithmetic number, because the mean of its divisors is an integer number (12620166).

Almost surely, 2^25240331 is an apocalyptic number.

25240331 is a deficient number, since it is larger than the sum of its proper divisors (1).

25240331 is an equidigital number, since it uses as much as digits as its factorization.

25240331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 25240331 is about 5023.9756169790. The cubic root of 25240331 is about 293.3357634383.

Adding to 25240331 its reverse (13304252), we get a palindrome (38544583).

The spelling of 25240331 in words is "twenty-five million, two hundred forty thousand, three hundred thirty-one".