31360544261 has 2 divisors, whose sum is σ = 31360544262. Its totient is φ = 31360544260.

The previous prime is 31360544153. The next prime is 31360544287. The reversal of 31360544261 is 16244506313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18929632225 + 12430912036 = 137585^2 + 111494^2 .

It is a cyclic number.

It is not a de Polignac number, because 31360544261 - 2¹⁸ = 31360282117 is a prime.

It is a super-2 number, since 2×31360544261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31360544561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15680272130 + 15680272131.

It is an arithmetic number, because the mean of its divisors is an integer number (15680272131).

Almost surely, 2^31360544261 is an apocalyptic number.

It is an amenable number.

31360544261 is a deficient number, since it is larger than the sum of its proper divisors (1).

31360544261 is an equidigital number, since it uses as much as digits as its factorization.

31360544261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 31360544261 in words is "thirty-one billion, three hundred sixty million, five hundred forty-four thousand, two hundred sixty-one".