31265753261 has 2 divisors, whose sum is σ = 31265753262. Its totient is φ = 31265753260.

The previous prime is 31265753251. The next prime is 31265753287. The reversal of 31265753261 is 16235756213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30951364900 + 314388361 = 175930^2 + 17731^2 .

It is a cyclic number.

It is not a de Polignac number, because 31265753261 - 2¹⁴ = 31265736877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31265753251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15632876630 + 15632876631.

It is an arithmetic number, because the mean of its divisors is an integer number (15632876631).

Almost surely, 2^31265753261 is an apocalyptic number.

It is an amenable number.

31265753261 is a deficient number, since it is larger than the sum of its proper divisors (1).

31265753261 is an equidigital number, since it uses as much as digits as its factorization.

31265753261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 41.

The spelling of 31265753261 in words is "thirty-one billion, two hundred sixty-five million, seven hundred fifty-three thousand, two hundred sixty-one".