25091440931 has 2 divisors, whose sum is σ = 25091440932. Its totient is φ = 25091440930.

The previous prime is 25091440901. The next prime is 25091440939. The reversal of 25091440931 is 13904419052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25091440931 - 2⁶ = 25091440867 is a prime.

It is a super-2 number, since 2×25091440931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25091440939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12545720465 + 12545720466.

It is an arithmetic number, because the mean of its divisors is an integer number (12545720466).

Almost surely, 2^25091440931 is an apocalyptic number.

25091440931 is a deficient number, since it is larger than the sum of its proper divisors (1).

25091440931 is an equidigital number, since it uses as much as digits as its factorization.

25091440931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

Adding to 25091440931 its reverse (13904419052), we get a palindrome (38995859983).

The spelling of 25091440931 in words is "twenty-five billion, ninety-one million, four hundred forty thousand, nine hundred thirty-one".