31331322349 has 2 divisors, whose sum is σ = 31331322350. Its totient is φ = 31331322348.

The previous prime is 31331322301. The next prime is 31331322377. The reversal of 31331322349 is 94322313313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27561976324 + 3769346025 = 166018^2 + 61395^2 .

It is a cyclic number.

It is not a de Polignac number, because 31331322349 - 2¹⁹ = 31330798061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31331382349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15665661174 + 15665661175.

It is an arithmetic number, because the mean of its divisors is an integer number (15665661175).

Almost surely, 2^31331322349 is an apocalyptic number.

It is an amenable number.

31331322349 is a deficient number, since it is larger than the sum of its proper divisors (1).

31331322349 is an equidigital number, since it uses as much as digits as its factorization.

31331322349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 34.

The spelling of 31331322349 in words is "thirty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, three hundred forty-nine".