72005222 has 16 divisors (see below), whose sum is σ = 111352320. Its totient is φ = 34902408.

The previous prime is 72005221. The next prime is 72005233. The reversal of 72005222 is 22250027.

It is a junction number, because it is equal to n+sod(n) for n = 72005194 and 72005203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72005221) 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, 6479 + ... + 13637.

It is an arithmetic number, because the mean of its divisors is an integer number (6959520).

Almost surely, 2^72005222 is an apocalyptic number.

72005222 is a deficient number, since it is larger than the sum of its proper divisors (39347098).

72005222 is a wasteful number, since it uses less digits than its factorization.

72005222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7315.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 72005222 is about 8485.5890779604. The cubic root of 72005222 is about 416.0268219577.

Adding to 72005222 its reverse (22250027), we get a palindrome (94255249).

It can be divided in two parts, 72005 and 222, that added together give a palindrome (72227).

The spelling of 72005222 in words is "seventy-two million, five thousand, two hundred twenty-two".