722891031 has 4 divisors (see below), whose sum is σ = 963854712. Its totient is φ = 481927352.

The previous prime is 722891027. The next prime is 722891083. The reversal of 722891031 is 130198227.

722891031 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.

It is a cyclic number.

It is not a de Polignac number, because 722891031 - 2² = 722891027 is a prime.

It is a super-2 number, since 2×722891031² = 1045142885400485922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 722890983 and 722891001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722891011) 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, 120481836 + ... + 120481841.

It is an arithmetic number, because the mean of its divisors is an integer number (240963678).

Almost surely, 2^722891031 is an apocalyptic number.

722891031 is a deficient number, since it is larger than the sum of its proper divisors (240963681).

722891031 is a wasteful number, since it uses less digits than its factorization.

722891031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240963680.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 722891031 is about 26886.6329427840. The cubic root of 722891031 is about 897.4789657886.

The spelling of 722891031 in words is "seven hundred twenty-two million, eight hundred ninety-one thousand, thirty-one".