25195321231 has 2 divisors, whose sum is σ = 25195321232. Its totient is φ = 25195321230.

The previous prime is 25195321219. The next prime is 25195321247. The reversal of 25195321231 is 13212359152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25195321231 - 2¹⁷ = 25195190159 is a prime.

It is a super-2 number, since 2×25195321231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25195327231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597660615 + 12597660616.

It is an arithmetic number, because the mean of its divisors is an integer number (12597660616).

Almost surely, 2^25195321231 is an apocalyptic number.

25195321231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25195321231 is an equidigital number, since it uses as much as digits as its factorization.

25195321231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 34.

The spelling of 25195321231 in words is "twenty-five billion, one hundred ninety-five million, three hundred twenty-one thousand, two hundred thirty-one".