722426651 has 4 divisors (see below), whose sum is σ = 725092704. Its totient is φ = 719760600.

The previous prime is 722426647. The next prime is 722426689. The reversal of 722426651 is 156624227.

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 722426651 - 2² = 722426647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722426851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332620 + ... + 1333161.

It is an arithmetic number, because the mean of its divisors is an integer number (181273176).

Almost surely, 2^722426651 is an apocalyptic number.

722426651 is a deficient number, since it is larger than the sum of its proper divisors (2666053).

722426651 is a wasteful number, since it uses less digits than its factorization.

722426651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666052.

The product of its digits is 40320, while the sum is 35.

The square root of 722426651 is about 26877.9956655998. The cubic root of 722426651 is about 897.2867466114.

The spelling of 722426651 in words is "seven hundred twenty-two million, four hundred twenty-six thousand, six hundred fifty-one".