31351863777253 has 2 divisors, whose sum is σ = 31351863777254. Its totient is φ = 31351863777252.

The previous prime is 31351863777229. The next prime is 31351863777259. The reversal of 31351863777253 is 35277736815313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30486818691169 + 865045086084 = 5521487^2 + 930078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31351863777253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31351863777191 and 31351863777200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31351863777259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15675931888626 + 15675931888627.

It is an arithmetic number, because the mean of its divisors is an integer number (15675931888627).

Almost surely, 2^{31351863777253} is an apocalyptic number.

It is an amenable number.

31351863777253 is a deficient number, since it is larger than the sum of its proper divisors (1).

31351863777253 is an equidigital number, since it uses as much as digits as its factorization.

31351863777253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66679200, while the sum is 61.

The spelling of 31351863777253 in words is "thirty-one trillion, three hundred fifty-one billion, eight hundred sixty-three million, seven hundred seventy-seven thousand, two hundred fifty-three".