722571313 has 4 divisors (see below), whose sum is σ = 736204788. Its totient is φ = 708937840.

The previous prime is 722571277. The next prime is 722571319. The reversal of 722571313 is 313175227.

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

It can be written as a sum of positive squares in 2 ways, for example, as 362217024 + 360354289 = 19032^2 + 18983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-722571313 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722571319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6816658 + ... + 6816763.

It is an arithmetic number, because the mean of its divisors is an integer number (184051197).

Almost surely, 2^722571313 is an apocalyptic number.

It is an amenable number.

722571313 is a deficient number, since it is larger than the sum of its proper divisors (13633475).

722571313 is a wasteful number, since it uses less digits than its factorization.

722571313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13633474.

The product of its digits is 8820, while the sum is 31.

The square root of 722571313 is about 26880.6866169746. The cubic root of 722571313 is about 897.3466348745.

The spelling of 722571313 in words is "seven hundred twenty-two million, five hundred seventy-one thousand, three hundred thirteen".