72122202 has 12 divisors (see below), whose sum is σ = 156264810. Its totient is φ = 24040728.

The previous prime is 72122179. The next prime is 72122209. The reversal of 72122202 is 20222127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45279441 + 26842761 = 6729^2 + 5181^2 .

It is a super-2 number, since 2×72122202² = 10403224042657608, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 4006789 = 72122202 / (7 + 2 + 1 + 2 + 2 + 2 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (72122209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2003377 + ... + 2003412.

Almost surely, 2^72122202 is an apocalyptic number.

72122202 is an abundant number, since it is smaller than the sum of its proper divisors (84142608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72122202 is a wasteful number, since it uses less digits than its factorization.

72122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006797 (or 4006794 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 72122202 is about 8492.4791433362. The cubic root of 72122202 is about 416.2519930646.

Adding to 72122202 its reverse (20222127), we get a palindrome (92344329).

The spelling of 72122202 in words is "seventy-two million, one hundred twenty-two thousand, two hundred two".