72227266 has 4 divisors (see below), whose sum is σ = 108340902. Its totient is φ = 36113632.

The previous prime is 72227263. The next prime is 72227299. The reversal of 72227266 is 66272227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66272227 = 7 ⋅9467461.

It can be written as a sum of positive squares in only one way, i.e., 38180041 + 34047225 = 6179^2 + 5835^2 .

It is not an unprimeable number, because it can be changed into a prime (72227261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18056815 + ... + 18056818.

Almost surely, 2^72227266 is an apocalyptic number.

72227266 is a deficient number, since it is larger than the sum of its proper divisors (36113636).

72227266 is a wasteful number, since it uses less digits than its factorization.

72227266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36113635.

The product of its digits is 28224, while the sum is 34.

The square root of 72227266 is about 8498.6626006684. The cubic root of 72227266 is about 416.4540199916.

The spelling of 72227266 in words is "seventy-two million, two hundred twenty-seven thousand, two hundred sixty-six".