722135217 has 16 divisors (see below), whose sum is σ = 969693120. Its totient is φ = 478011072.

The previous prime is 722135191. The next prime is 722135237. The reversal of 722135217 is 712531227.

It is not a de Polignac number, because 722135217 - 2¹⁶ = 722069681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722135237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402759 + ... + 404547.

It is an arithmetic number, because the mean of its divisors is an integer number (60605820).

Almost surely, 2^722135217 is an apocalyptic number.

It is an amenable number.

722135217 is a deficient number, since it is larger than the sum of its proper divisors (247557903).

722135217 is a wasteful number, since it uses less digits than its factorization.

722135217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672.

The product of its digits is 5880, while the sum is 30.

The square root of 722135217 is about 26872.5736951264. The cubic root of 722135217 is about 897.1660722900.

The spelling of 722135217 in words is "seven hundred twenty-two million, one hundred thirty-five thousand, two hundred seventeen".