25431022402427 has 2 divisors, whose sum is σ = 25431022402428. Its totient is φ = 25431022402426.

The previous prime is 25431022402397. The next prime is 25431022402523. The reversal of 25431022402427 is 72420422013452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25431022402427 - 2⁸ = 25431022402171 is a prime.

It is not a weakly prime, because it can be changed into another prime (25431022492427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715511201213 + 12715511201214.

It is an arithmetic number, because the mean of its divisors is an integer number (12715511201214).

Almost surely, 2^{25431022402427} is an apocalyptic number.

25431022402427 is a deficient number, since it is larger than the sum of its proper divisors (1).

25431022402427 is an equidigital number, since it uses as much as digits as its factorization.

25431022402427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 38.

Adding to 25431022402427 its reverse (72420422013452), we get a palindrome (97851444415879).

The spelling of 25431022402427 in words is "twenty-five trillion, four hundred thirty-one billion, twenty-two million, four hundred two thousand, four hundred twenty-seven".