83218172 has 12 divisors (see below), whose sum is σ = 146921376. Its totient is φ = 41240640.

The previous prime is 83218171. The next prime is 83218181. The reversal of 83218172 is 27181238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83218171) 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, 91604 + ... + 92507.

It is an arithmetic number, because the mean of its divisors is an integer number (12243448).

Almost surely, 2^83218172 is an apocalyptic number.

It is an amenable number.

83218172 is a deficient number, since it is larger than the sum of its proper divisors (63703204).

83218172 is a wasteful number, since it uses less digits than its factorization.

83218172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184228 (or 184226 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 83218172 is about 9122.3994650530. The cubic root of 83218172 is about 436.5889342304.

The spelling of 83218172 in words is "eighty-three million, two hundred eighteen thousand, one hundred seventy-two".