31352300561 has 2 divisors, whose sum is σ = 31352300562. Its totient is φ = 31352300560.

The previous prime is 31352300549. The next prime is 31352300579. The reversal of 31352300561 is 16500325313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23483723536 + 7868577025 = 153244^2 + 88705^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31352300561 is a prime.

It is not a weakly prime, because it can be changed into another prime (31352300591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15676150280 + 15676150281.

It is an arithmetic number, because the mean of its divisors is an integer number (15676150281).

Almost surely, 2^31352300561 is an apocalyptic number.

It is an amenable number.

31352300561 is a deficient number, since it is larger than the sum of its proper divisors (1).

31352300561 is an equidigital number, since it uses as much as digits as its factorization.

31352300561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 29.

Adding to 31352300561 its reverse (16500325313), we get a palindrome (47852625874).

The spelling of 31352300561 in words is "thirty-one billion, three hundred fifty-two million, three hundred thousand, five hundred sixty-one".