72251122 has 16 divisors (see below), whose sum is σ = 118710360. Its totient is φ = 32827648.

The previous prime is 72251089. The next prime is 72251131. The reversal of 72251122 is 22115227.

It can be written as a sum of positive squares in 4 ways, for example, as 60078001 + 12173121 = 7751^2 + 3489^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72251093 and 72251102.

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, 35653 + ... + 37624.

Almost surely, 2^72251122 is an apocalyptic number.

72251122 is a deficient number, since it is larger than the sum of its proper divisors (46459238).

72251122 is a wasteful number, since it uses less digits than its factorization.

72251122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73325.

The product of its digits is 560, while the sum is 22.

The square root of 72251122 is about 8500.0659997438. The cubic root of 72251122 is about 416.4998652522.

Adding to 72251122 its reverse (22115227), we get a palindrome (94366349).

The spelling of 72251122 in words is "seventy-two million, two hundred fifty-one thousand, one hundred twenty-two".