31525225133 has 2 divisors, whose sum is σ = 31525225134. Its totient is φ = 31525225132.

The previous prime is 31525225093. The next prime is 31525225139. The reversal of 31525225133 is 33152252513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26923230889 + 4601994244 = 164083^2 + 67838^2 .

It is a cyclic number.

It is not a de Polignac number, because 31525225133 - 2⁸ = 31525224877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31525225133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31525225139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15762612566 + 15762612567.

It is an arithmetic number, because the mean of its divisors is an integer number (15762612567).

Almost surely, 2^31525225133 is an apocalyptic number.

It is an amenable number.

31525225133 is a deficient number, since it is larger than the sum of its proper divisors (1).

31525225133 is an equidigital number, since it uses as much as digits as its factorization.

31525225133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 32.

Adding to 31525225133 its reverse (33152252513), we get a palindrome (64677477646).

The spelling of 31525225133 in words is "thirty-one billion, five hundred twenty-five million, two hundred twenty-five thousand, one hundred thirty-three".