722539315217 has 2 divisors, whose sum is σ = 722539315218. Its totient is φ = 722539315216.

The previous prime is 722539315187. The next prime is 722539315231. The reversal of 722539315217 is 712513935227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587171245441 + 135368069776 = 766271^2 + 367924^2 .

It is a cyclic number.

It is not a de Polignac number, because 722539315217 - 2⁶ = 722539315153 is a prime.

It is not a weakly prime, because it can be changed into another prime (722539315117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361269657608 + 361269657609.

It is an arithmetic number, because the mean of its divisors is an integer number (361269657609).

Almost surely, 2^722539315217 is an apocalyptic number.

It is an amenable number.

722539315217 is a deficient number, since it is larger than the sum of its proper divisors (1).

722539315217 is an equidigital number, since it uses as much as digits as its factorization.

722539315217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 47.

The spelling of 722539315217 in words is "seven hundred twenty-two billion, five hundred thirty-nine million, three hundred fifteen thousand, two hundred seventeen".