31213200313 has 2 divisors, whose sum is σ = 31213200314. Its totient is φ = 31213200312.

The previous prime is 31213200253. The next prime is 31213200367. The reversal of 31213200313 is 31300231213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24917253904 + 6295946409 = 157852^2 + 79347^2 .

It is an emirp because it is prime and its reverse (31300231213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31213200313 is a prime.

It is not a weakly prime, because it can be changed into another prime (31213203313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606600156 + 15606600157.

It is an arithmetic number, because the mean of its divisors is an integer number (15606600157).

Almost surely, 2^31213200313 is an apocalyptic number.

It is an amenable number.

31213200313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213200313 is an equidigital number, since it uses as much as digits as its factorization.

31213200313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31213200313 its reverse (31300231213), we get a palindrome (62513431526).

The spelling of 31213200313 in words is "thirty-one billion, two hundred thirteen million, two hundred thousand, three hundred thirteen".