722255731 has 4 divisors (see below), whose sum is σ = 727942912. Its totient is φ = 716568552.

The previous prime is 722255719. The next prime is 722255741. The reversal of 722255731 is 137552227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722255731 is a prime.

It is a super-2 number, since 2×722255731² = 1043306681924688722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722255741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2843400 + ... + 2843653.

It is an arithmetic number, because the mean of its divisors is an integer number (181985728).

Almost surely, 2^722255731 is an apocalyptic number.

722255731 is a deficient number, since it is larger than the sum of its proper divisors (5687181).

722255731 is a wasteful number, since it uses less digits than its factorization.

722255731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5687180.

The product of its digits is 29400, while the sum is 34.

The square root of 722255731 is about 26874.8159249510. The cubic root of 722255731 is about 897.2159775596.

The spelling of 722255731 in words is "seven hundred twenty-two million, two hundred fifty-five thousand, seven hundred thirty-one".