31261202444281 has 2 divisors, whose sum is σ = 31261202444282. Its totient is φ = 31261202444280.

The previous prime is 31261202444273. The next prime is 31261202444309. The reversal of 31261202444281 is 18244420216213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30049133560681 + 1212068883600 = 5481709^2 + 1100940^2 .

It is a cyclic number.

It is not a de Polignac number, because 31261202444281 - 2³ = 31261202444273 is a prime.

It is a super-2 number, since 2×31261202444281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31261202444881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15630601222140 + 15630601222141.

It is an arithmetic number, because the mean of its divisors is an integer number (15630601222141).

Almost surely, 2^{31261202444281} is an apocalyptic number.

It is an amenable number.

31261202444281 is a deficient number, since it is larger than the sum of its proper divisors (1).

31261202444281 is an equidigital number, since it uses as much as digits as its factorization.

31261202444281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 31261202444281 in words is "thirty-one trillion, two hundred sixty-one billion, two hundred two million, four hundred forty-four thousand, two hundred eighty-one".