72212223 has 8 divisors (see below), whose sum is σ = 96626736. Its totient is φ = 47969600.

The previous prime is 72212213. The next prime is 72212279. The reversal of 72212223 is 32221227.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72212223 - 2⁴ = 72212207 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 72212223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72212213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41988 + ... + 43673.

It is an arithmetic number, because the mean of its divisors is an integer number (12078342).

Almost surely, 2^72212223 is an apocalyptic number.

72212223 is a deficient number, since it is larger than the sum of its proper divisors (24414513).

72212223 is a wasteful number, since it uses less digits than its factorization.

72212223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85945.

The product of its digits is 672, while the sum is 21.

The square root of 72212223 is about 8497.7775329788. Note that the first 3 decimals coincide. The cubic root of 72212223 is about 416.4251059210.

The spelling of 72212223 in words is "seventy-two million, two hundred twelve thousand, two hundred twenty-three".