72217343 has 12 divisors (see below), whose sum is σ = 83693112. Its totient is φ = 61787520.

The previous prime is 72217307. The next prime is 72217349. The reversal of 72217343 is 34371227.

It is not a de Polignac number, because 72217343 - 2⁸ = 72217087 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72217349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8180 + ... + 14537.

It is an arithmetic number, because the mean of its divisors is an integer number (6974426).

Almost surely, 2^72217343 is an apocalyptic number.

72217343 is a deficient number, since it is larger than the sum of its proper divisors (11475769).

72217343 is a wasteful number, since it uses less digits than its factorization.

72217343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22762 (or 22745 counting only the distinct ones).

The product of its digits is 7056, while the sum is 29.

The square root of 72217343 is about 8498.0787828779. The cubic root of 72217343 is about 416.4349474966.

The spelling of 72217343 in words is "seventy-two million, two hundred seventeen thousand, three hundred forty-three".