31304050313 has 2 divisors, whose sum is σ = 31304050314. Its totient is φ = 31304050312.

The previous prime is 31304050289. The next prime is 31304050361. The reversal of 31304050313 is 31305040313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29759010064 + 1545040249 = 172508^2 + 39307^2 .

It is a cyclic number.

It is not a de Polignac number, because 31304050313 - 2¹² = 31304046217 is a prime.

It is not a weakly prime, because it can be changed into another prime (31304050513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15652025156 + 15652025157.

It is an arithmetic number, because the mean of its divisors is an integer number (15652025157).

Almost surely, 2^31304050313 is an apocalyptic number.

It is an amenable number.

31304050313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31304050313 is an equidigital number, since it uses as much as digits as its factorization.

31304050313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 23.

Adding to 31304050313 its reverse (31305040313), we get a palindrome (62609090626).

The spelling of 31304050313 in words is "thirty-one billion, three hundred four million, fifty thousand, three hundred thirteen".