31432283681 has 2 divisors, whose sum is σ = 31432283682. Its totient is φ = 31432283680.

The previous prime is 31432283657. The next prime is 31432283683. The reversal of 31432283681 is 18638223413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21475437025 + 9956846656 = 146545^2 + 99784^2 .

It is a cyclic number.

It is not a de Polignac number, because 31432283681 - 2³⁴ = 14252414497 is a prime.

It is a super-2 number, since 2×31432283681² (a number of 22 digits) contains 22 as substring.

Together with 31432283683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31432283683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15716141840 + 15716141841.

It is an arithmetic number, because the mean of its divisors is an integer number (15716141841).

Almost surely, 2^31432283681 is an apocalyptic number.

It is an amenable number.

31432283681 is a deficient number, since it is larger than the sum of its proper divisors (1).

31432283681 is an equidigital number, since it uses as much as digits as its factorization.

31432283681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The spelling of 31432283681 in words is "thirty-one billion, four hundred thirty-two million, two hundred eighty-three thousand, six hundred eighty-one".