72147226 has 8 divisors (see below), whose sum is σ = 108263124. Its totient is φ = 36059520.

The previous prime is 72147221. The next prime is 72147233. The reversal of 72147226 is 62274127.

It can be written as a sum of positive squares in 2 ways, for example, as 71149225 + 998001 = 8435^2 + 999^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (72147221) 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 in 3 ways as a sum of consecutive naturals, for example, 1356 + ... + 12088.

Almost surely, 2^72147226 is an apocalyptic number.

72147226 is a deficient number, since it is larger than the sum of its proper divisors (36115898).

72147226 is a wasteful number, since it uses less digits than its factorization.

72147226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14096.

The product of its digits is 9408, while the sum is 31.

The square root of 72147226 is about 8493.9523191504. The cubic root of 72147226 is about 416.3001293533.

The spelling of 72147226 in words is "seventy-two million, one hundred forty-seven thousand, two hundred twenty-six".