25431863 has 2 divisors, whose sum is σ = 25431864. Its totient is φ = 25431862.

The previous prime is 25431853. The next prime is 25431911. The reversal of 25431863 is 36813452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25431863 - 2¹⁴ = 25415479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25431853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715931 + 12715932.

It is an arithmetic number, because the mean of its divisors is an integer number (12715932).

Almost surely, 2^25431863 is an apocalyptic number.

25431863 is a deficient number, since it is larger than the sum of its proper divisors (1).

25431863 is an equidigital number, since it uses as much as digits as its factorization.

25431863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 25431863 is about 5043.0013880625. The cubic root of 25431863 is about 294.0758708656.

The spelling of 25431863 in words is "twenty-five million, four hundred thirty-one thousand, eight hundred sixty-three".