31109420833 has 2 divisors, whose sum is σ = 31109420834. Its totient is φ = 31109420832.

The previous prime is 31109420779. The next prime is 31109420843. The reversal of 31109420833 is 33802490113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30431755809 + 677665024 = 174447^2 + 26032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31109420833 is a prime.

It is not a weakly prime, because it can be changed into another prime (31109420843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15554710416 + 15554710417.

It is an arithmetic number, because the mean of its divisors is an integer number (15554710417).

Almost surely, 2^31109420833 is an apocalyptic number.

It is an amenable number.

31109420833 is a deficient number, since it is larger than the sum of its proper divisors (1).

31109420833 is an equidigital number, since it uses as much as digits as its factorization.

31109420833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 31109420833 in words is "thirty-one billion, one hundred nine million, four hundred twenty thousand, eight hundred thirty-three".