722220722 has 4 divisors (see below), whose sum is σ = 1083331086. Its totient is φ = 361110360.

The previous prime is 722220721. The next prime is 722220739. The reversal of 722220722 is 227022227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 227022227 = 6247 ⋅36341.

It can be written as a sum of positive squares in only one way, i.e., 511709641 + 210511081 = 22621^2 + 14509^2 .

It is a junction number, because it is equal to n+sod(n) for n = 722220691 and 722220700.

It is not an unprimeable number, because it can be changed into a prime (722220721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180555179 + ... + 180555182.

Almost surely, 2^722220722 is an apocalyptic number.

722220722 is a deficient number, since it is larger than the sum of its proper divisors (361110364).

722220722 is a wasteful number, since it uses less digits than its factorization.

722220722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361110363.

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 722220722 is about 26874.1645823642. The cubic root of 722220722 is about 897.2014807822.

Adding to 722220722 its reverse (227022227), we get a palindrome (949242949).

The spelling of 722220722 in words is "seven hundred twenty-two million, two hundred twenty thousand, seven hundred twenty-two".