72122722 has 16 divisors (see below), whose sum is σ = 126270720. Its totient is φ = 30251808.

The previous prime is 72122719. The next prime is 72122761. The reversal of 72122722 is 22722127.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54147 + ... + 55462.

It is an arithmetic number, because the mean of its divisors is an integer number (7891920).

Almost surely, 2^72122722 is an apocalyptic number.

72122722 is a deficient number, since it is larger than the sum of its proper divisors (54147998).

72122722 is a wasteful number, since it uses less digits than its factorization.

72122722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109665.

The product of its digits is 1568, while the sum is 25.

The square root of 72122722 is about 8492.5097586049. The cubic root of 72122722 is about 416.2529934524.

Adding to 72122722 its reverse (22722127), we get a palindrome (94844849).

The spelling of 72122722 in words is "seventy-two million, one hundred twenty-two thousand, seven hundred twenty-two".