25031543231 has 2 divisors, whose sum is σ = 25031543232. Its totient is φ = 25031543230.

The previous prime is 25031543219. The next prime is 25031543261. The reversal of 25031543231 is 13234513052.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25031543231 - 2⁶ = 25031543167 is a prime.

It is a super-2 number, since 2×25031543231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25031543194 and 25031543203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25031543261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12515771615 + 12515771616.

It is an arithmetic number, because the mean of its divisors is an integer number (12515771616).

Almost surely, 2^25031543231 is an apocalyptic number.

25031543231 is a deficient number, since it is larger than the sum of its proper divisors (1).

25031543231 is an equidigital number, since it uses as much as digits as its factorization.

25031543231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 25031543231 in words is "twenty-five billion, thirty-one million, five hundred forty-three thousand, two hundred thirty-one".