72207722 has 8 divisors (see below), whose sum is σ = 108490116. Its totient is φ = 36044352.

The previous prime is 72207719. The next prime is 72207739. The reversal of 72207722 is 22770227.

It can be written as a sum of positive squares in 2 ways, for example, as 51423241 + 20784481 = 7171^2 + 4559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28223 + ... + 30674.

Almost surely, 2^72207722 is an apocalyptic number.

72207722 is a deficient number, since it is larger than the sum of its proper divisors (36282394).

72207722 is a wasteful number, since it uses less digits than its factorization.

72207722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59512.

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 72207722 is about 8497.5126949008. The cubic root of 72207722 is about 416.4164537923.

Adding to 72207722 its reverse (22770227), we get a palindrome (94977949).

The spelling of 72207722 in words is "seventy-two million, two hundred seven thousand, seven hundred twenty-two".