31133005649 has 2 divisors, whose sum is σ = 31133005650. Its totient is φ = 31133005648.

The previous prime is 31133005613. The next prime is 31133005667. The reversal of 31133005649 is 94650033113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30048489025 + 1084516624 = 173345^2 + 32932^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133005649 - 2²⁴ = 31116228433 is a prime.

It is a super-2 number, since 2×31133005649² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31133005669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15566502824 + 15566502825.

It is an arithmetic number, because the mean of its divisors is an integer number (15566502825).

Almost surely, 2^31133005649 is an apocalyptic number.

It is an amenable number.

31133005649 is a deficient number, since it is larger than the sum of its proper divisors (1).

31133005649 is an equidigital number, since it uses as much as digits as its factorization.

31133005649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 35.

The spelling of 31133005649 in words is "thirty-one billion, one hundred thirty-three million, five thousand, six hundred forty-nine".