31243026653 has 2 divisors, whose sum is σ = 31243026654. Its totient is φ = 31243026652.

The previous prime is 31243026641. The next prime is 31243026673. The reversal of 31243026653 is 35662034213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29796973924 + 1446052729 = 172618^2 + 38027^2 .

It is a cyclic number.

It is not a de Polignac number, because 31243026653 - 2⁶ = 31243026589 is a prime.

It is a super-2 number, since 2×31243026653² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31243026613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15621513326 + 15621513327.

It is an arithmetic number, because the mean of its divisors is an integer number (15621513327).

Almost surely, 2^31243026653 is an apocalyptic number.

It is an amenable number.

31243026653 is a deficient number, since it is larger than the sum of its proper divisors (1).

31243026653 is an equidigital number, since it uses as much as digits as its factorization.

31243026653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 35.

The spelling of 31243026653 in words is "thirty-one billion, two hundred forty-three million, twenty-six thousand, six hundred fifty-three".