31132320029 has 2 divisors, whose sum is σ = 31132320030. Its totient is φ = 31132320028.

The previous prime is 31132319971. The next prime is 31132320071. The reversal of 31132320029 is 92002323113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31002405625 + 129914404 = 176075^2 + 11398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31132320029 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31132320529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566160014 + 15566160015.

It is an arithmetic number, because the mean of its divisors is an integer number (15566160015).

Almost surely, 2^31132320029 is an apocalyptic number.

It is an amenable number.

31132320029 is a deficient number, since it is larger than the sum of its proper divisors (1).

31132320029 is an equidigital number, since it uses as much as digits as its factorization.

31132320029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 31132320029 in words is "thirty-one billion, one hundred thirty-two million, three hundred twenty thousand, twenty-nine".