722431057 has 4 divisors (see below), whose sum is σ = 722900800. Its totient is φ = 721961316.

The previous prime is 722431043. The next prime is 722431097. The reversal of 722431057 is 750134227.

722431057 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750134227 = 1987 ⋅377521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722431057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722431007) 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, 232557 + ... + 235642.

It is an arithmetic number, because the mean of its divisors is an integer number (180725200).

Almost surely, 2^722431057 is an apocalyptic number.

It is an amenable number.

722431057 is a deficient number, since it is larger than the sum of its proper divisors (469743).

722431057 is a wasteful number, since it uses less digits than its factorization.

722431057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469742.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 722431057 is about 26878.0776284317. The cubic root of 722431057 is about 897.2885707584.

The spelling of 722431057 in words is "seven hundred twenty-two million, four hundred thirty-one thousand, fifty-seven".