31212302293 has 2 divisors, whose sum is σ = 31212302294. Its totient is φ = 31212302292.

The previous prime is 31212302281. The next prime is 31212302299. The reversal of 31212302293 is 39220321213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28472512644 + 2739789649 = 168738^2 + 52343^2 .

It is a cyclic number.

It is not a de Polignac number, because 31212302293 - 2⁹ = 31212301781 is a prime.

It is a super-2 number, since 2×31212302293² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 15606151146 + 15606151147.

It is an arithmetic number, because the mean of its divisors is an integer number (15606151147).

Almost surely, 2^31212302293 is an apocalyptic number.

It is an amenable number.

31212302293 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212302293 is an equidigital number, since it uses as much as digits as its factorization.

31212302293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 31212302293 in words is "thirty-one billion, two hundred twelve million, three hundred two thousand, two hundred ninety-three".