31503051361 has 2 divisors, whose sum is σ = 31503051362. Its totient is φ = 31503051360.

The previous prime is 31503051347. The next prime is 31503051367. The reversal of 31503051361 is 16315030513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22614144400 + 8888906961 = 150380^2 + 94281^2 .

It is a cyclic number.

It is not a de Polignac number, because 31503051361 - 2⁷ = 31503051233 is a prime.

It is not a weakly prime, because it can be changed into another prime (31503051367) 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, 15751525680 + 15751525681.

It is an arithmetic number, because the mean of its divisors is an integer number (15751525681).

Almost surely, 2^31503051361 is an apocalyptic number.

It is an amenable number.

31503051361 is a deficient number, since it is larger than the sum of its proper divisors (1).

31503051361 is an equidigital number, since it uses as much as digits as its factorization.

31503051361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 28.

Adding to 31503051361 its reverse (16315030513), we get a palindrome (47818081874).

The spelling of 31503051361 in words is "thirty-one billion, five hundred three million, fifty-one thousand, three hundred sixty-one".