31210002149 has 2 divisors, whose sum is σ = 31210002150. Its totient is φ = 31210002148.

The previous prime is 31210002097. The next prime is 31210002169. The reversal of 31210002149 is 94120001213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28930608100 + 2279394049 = 170090^2 + 47743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31210002149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31210002169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605001074 + 15605001075.

It is an arithmetic number, because the mean of its divisors is an integer number (15605001075).

Almost surely, 2^31210002149 is an apocalyptic number.

It is an amenable number.

31210002149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31210002149 is an equidigital number, since it uses as much as digits as its factorization.

31210002149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 31210002149 in words is "thirty-one billion, two hundred ten million, two thousand, one hundred forty-nine".