72243227 has 4 divisors (see below), whose sum is σ = 82563696. Its totient is φ = 61922760.

The previous prime is 72243221. The next prime is 72243233. The reversal of 72243227 is 72234227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72234227 = 13 ⋅5556479.

It is an interprime number because it is at equal distance from previous prime (72243221) and next prime (72243233).

It is a cyclic number.

It is not a de Polignac number, because 72243227 - 2⁶ = 72243163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72243227.

It is not an unprimeable number, because it can be changed into a prime (72243221) 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, 5160224 + ... + 5160237.

It is an arithmetic number, because the mean of its divisors is an integer number (20640924).

Almost surely, 2^72243227 is an apocalyptic number.

72243227 is a deficient number, since it is larger than the sum of its proper divisors (10320469).

72243227 is a wasteful number, since it uses less digits than its factorization.

72243227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10320468.

The product of its digits is 9408, while the sum is 29.

The square root of 72243227 is about 8499.6015788977. The cubic root of 72243227 is about 416.4846941558.

The spelling of 72243227 in words is "seventy-two million, two hundred forty-three thousand, two hundred twenty-seven".