722690231 has 4 divisors (see below), whose sum is σ = 740316864. Its totient is φ = 705063600.

The previous prime is 722690219. The next prime is 722690239. The reversal of 722690231 is 132096227.

It is a happy number.

722690231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132096227 = 19 ⋅6952433.

It is a cyclic number.

It is not a de Polignac number, because 722690231 - 2⁶ = 722690167 is a prime.

It is a super-2 number, since 2×722690231² = 1044562339965666722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722690239) 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, 8813255 + ... + 8813336.

It is an arithmetic number, because the mean of its divisors is an integer number (185079216).

Almost surely, 2^722690231 is an apocalyptic number.

722690231 is a deficient number, since it is larger than the sum of its proper divisors (17626633).

722690231 is a wasteful number, since it uses less digits than its factorization.

722690231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17626632.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 722690231 is about 26882.8984858404. The cubic root of 722690231 is about 897.3958594570.

The spelling of 722690231 in words is "seven hundred twenty-two million, six hundred ninety thousand, two hundred thirty-one".