31204230313 has 2 divisors, whose sum is σ = 31204230314. Its totient is φ = 31204230312.

The previous prime is 31204230307. The next prime is 31204230329. The reversal of 31204230313 is 31303240213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29809058409 + 1395171904 = 172653^2 + 37352^2 .

It is a cyclic number.

It is not a de Polignac number, because 31204230313 - 2²⁵ = 31170675881 is a prime.

It is not a weakly prime, because it can be changed into another prime (31204230353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15602115156 + 15602115157.

It is an arithmetic number, because the mean of its divisors is an integer number (15602115157).

Almost surely, 2^31204230313 is an apocalyptic number.

It is an amenable number.

31204230313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31204230313 is an equidigital number, since it uses as much as digits as its factorization.

31204230313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31204230313 its reverse (31303240213), we get a palindrome (62507470526).

The spelling of 31204230313 in words is "thirty-one billion, two hundred four million, two hundred thirty thousand, three hundred thirteen".