31520066653 has 2 divisors, whose sum is σ = 31520066654. Its totient is φ = 31520066652.

The previous prime is 31520066593. The next prime is 31520066687. The reversal of 31520066653 is 35666002513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25817098329 + 5702968324 = 160677^2 + 75518^2 .

It is a cyclic number.

It is not a de Polignac number, because 31520066653 - 2²⁵ = 31486512221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31520066453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15760033326 + 15760033327.

It is an arithmetic number, because the mean of its divisors is an integer number (15760033327).

Almost surely, 2^31520066653 is an apocalyptic number.

It is an amenable number.

31520066653 is a deficient number, since it is larger than the sum of its proper divisors (1).

31520066653 is an equidigital number, since it uses as much as digits as its factorization.

31520066653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 31520066653 in words is "thirty-one billion, five hundred twenty million, sixty-six thousand, six hundred fifty-three".