72722122 has 16 divisors (see below), whose sum is σ = 120115872. Its totient is φ = 32745520.

The previous prime is 72722099. The next prime is 72722129. The reversal of 72722122 is 22122727.

It is not an unprimeable number, because it can be changed into a prime (72722129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13093 + ... + 17800.

It is an arithmetic number, because the mean of its divisors is an integer number (7507242).

Almost surely, 2^72722122 is an apocalyptic number.

72722122 is a deficient number, since it is larger than the sum of its proper divisors (47393750).

72722122 is a wasteful number, since it uses less digits than its factorization.

72722122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31013.

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

The square root of 72722122 is about 8527.7266607227. The cubic root of 72722122 is about 417.4029501792.

Adding to 72722122 its reverse (22122727), we get a palindrome (94844849).

The spelling of 72722122 in words is "seventy-two million, seven hundred twenty-two thousand, one hundred twenty-two".