25331387 has 2 divisors, whose sum is σ = 25331388. Its totient is φ = 25331386.

The previous prime is 25331381. The next prime is 25331401. The reversal of 25331387 is 78313352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25331387 - 2¹⁸ = 25069243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25331381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12665693 + 12665694.

It is an arithmetic number, because the mean of its divisors is an integer number (12665694).

Almost surely, 2^25331387 is an apocalyptic number.

25331387 is a deficient number, since it is larger than the sum of its proper divisors (1).

25331387 is an equidigital number, since it uses as much as digits as its factorization.

25331387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 25331387 is about 5033.0296045225. The cubic root of 25331387 is about 293.6880821964.

The spelling of 25331387 in words is "twenty-five million, three hundred thirty-one thousand, three hundred eighty-seven".