72222016 has 28 divisors (see below), whose sum is σ = 144379188. Its totient is φ = 35843072.

The previous prime is 72222011. The next prime is 72222019. The reversal of 72222016 is 61022227.

It can be written as a sum of positive squares in 2 ways, for example, as 44089600 + 28132416 = 6640^2 + 5304^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72222011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4650 + ... + 12886.

Almost surely, 2^72222016 is an apocalyptic number.

It is an amenable number.

72222016 is a deficient number, since it is larger than the sum of its proper divisors (72157172).

72222016 is a wasteful number, since it uses less digits than its factorization.

72222016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8386 (or 8376 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 72222016 is about 8498.3537229278. The cubic root of 72222016 is about 416.4439294505.

The spelling of 72222016 in words is "seventy-two million, two hundred twenty-two thousand, sixteen".