31253226142561 has 2 divisors, whose sum is σ = 31253226142562. Its totient is φ = 31253226142560.

The previous prime is 31253226142493. The next prime is 31253226142583. The reversal of 31253226142561 is 16524162235213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21193418384161 + 10059807758400 = 4603631^2 + 3171720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31253226142561 is a prime.

It is not a weakly prime, because it can be changed into another prime (31253226142361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15626613071280 + 15626613071281.

It is an arithmetic number, because the mean of its divisors is an integer number (15626613071281).

Almost surely, 2^{31253226142561} is an apocalyptic number.

It is an amenable number.

31253226142561 is a deficient number, since it is larger than the sum of its proper divisors (1).

31253226142561 is an equidigital number, since it uses as much as digits as its factorization.

31253226142561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 43.

Adding to 31253226142561 its reverse (16524162235213), we get a palindrome (47777388377774).

The spelling of 31253226142561 in words is "thirty-one trillion, two hundred fifty-three billion, two hundred twenty-six million, one hundred forty-two thousand, five hundred sixty-one".