31212302249 has 2 divisors, whose sum is σ = 31212302250. Its totient is φ = 31212302248.

The previous prime is 31212302201. The next prime is 31212302257. The reversal of 31212302249 is 94220321213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28120942249 + 3091360000 = 167693^2 + 55600^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212302249 - 2¹² = 31212298153 is a prime.

It is not a weakly prime, because it can be changed into another prime (31212302299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606151124 + 15606151125.

It is an arithmetic number, because the mean of its divisors is an integer number (15606151125).

Almost surely, 2^31212302249 is an apocalyptic number.

It is an amenable number.

31212302249 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212302249 is an equidigital number, since it uses as much as digits as its factorization.

31212302249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 31212302249 in words is "thirty-one billion, two hundred twelve million, three hundred two thousand, two hundred forty-nine".