31533252313 has 2 divisors, whose sum is σ = 31533252314. Its totient is φ = 31533252312.

The previous prime is 31533252293. The next prime is 31533252323. The reversal of 31533252313 is 31325233513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25365977289 + 6167275024 = 159267^2 + 78532^2 .

It is a cyclic number.

It is not a de Polignac number, because 31533252313 - 2¹⁷ = 31533121241 is a prime.

It is not a weakly prime, because it can be changed into another prime (31533252323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15766626156 + 15766626157.

It is an arithmetic number, because the mean of its divisors is an integer number (15766626157).

Almost surely, 2^31533252313 is an apocalyptic number.

It is an amenable number.

31533252313 is a deficient number, since it is larger than the sum of its proper divisors (1).

31533252313 is an equidigital number, since it uses as much as digits as its factorization.

31533252313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 31.

Adding to 31533252313 its reverse (31325233513), we get a palindrome (62858485826).

The spelling of 31533252313 in words is "thirty-one billion, five hundred thirty-three million, two hundred fifty-two thousand, three hundred thirteen".