731375536321 has 2 divisors, whose sum is σ = 731375536322. Its totient is φ = 731375536320.

The previous prime is 731375536277. The next prime is 731375536369. The reversal of 731375536321 is 123635573137.

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., 544254405696 + 187121130625 = 737736^2 + 432575^2 .

It is an emirp because it is prime and its reverse (123635573137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 731375536321 - 2¹⁵ = 731375503553 is a prime.

It is not a weakly prime, because it can be changed into another prime (731375536121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 365687768160 + 365687768161.

It is an arithmetic number, because the mean of its divisors is an integer number (365687768161).

Almost surely, 2^731375536321 is an apocalyptic number.

It is an amenable number.

731375536321 is a deficient number, since it is larger than the sum of its proper divisors (1).

731375536321 is an equidigital number, since it uses as much as digits as its factorization.

731375536321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 46.

The spelling of 731375536321 in words is "seven hundred thirty-one billion, three hundred seventy-five million, five hundred thirty-six thousand, three hundred twenty-one".