32431296581 has 2 divisors, whose sum is σ = 32431296582. Its totient is φ = 32431296580.

The previous prime is 32431296577. The next prime is 32431296673. The reversal of 32431296581 is 18569213423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20791044481 + 11640252100 = 144191^2 + 107890^2 .

It is a cyclic number.

It is not a de Polignac number, because 32431296581 - 2² = 32431296577 is a prime.

It is a super-2 number, since 2×32431296581² (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 (32431296181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16215648290 + 16215648291.

It is an arithmetic number, because the mean of its divisors is an integer number (16215648291).

Almost surely, 2^32431296581 is an apocalyptic number.

It is an amenable number.

32431296581 is a deficient number, since it is larger than the sum of its proper divisors (1).

32431296581 is an equidigital number, since it uses as much as digits as its factorization.

32431296581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 44.

The spelling of 32431296581 in words is "thirty-two billion, four hundred thirty-one million, two hundred ninety-six thousand, five hundred eighty-one".