31020443449 has 2 divisors, whose sum is σ = 31020443450. Its totient is φ = 31020443448.

The previous prime is 31020443437. The next prime is 31020443471. The reversal of 31020443449 is 94434402013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30195317824 + 825125625 = 173768^2 + 28725^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020443449 - 2¹¹ = 31020441401 is a prime.

It is not a weakly prime, because it can be changed into another prime (31020443429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510221724 + 15510221725.

It is an arithmetic number, because the mean of its divisors is an integer number (15510221725).

Almost surely, 2^31020443449 is an apocalyptic number.

It is an amenable number.

31020443449 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020443449 is an equidigital number, since it uses as much as digits as its factorization.

31020443449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 34.

The spelling of 31020443449 in words is "thirty-one billion, twenty million, four hundred forty-three thousand, four hundred forty-nine".