73221916 has 6 divisors (see below), whose sum is σ = 128138360. Its totient is φ = 36610956.

The previous prime is 73221913. The next prime is 73221917. The reversal of 73221916 is 61912237.

It is a super-2 number, since 2×73221916² = 10722897965422112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73221913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9152736 + ... + 9152743.

Almost surely, 2^73221916 is an apocalyptic number.

It is an amenable number.

73221916 is a deficient number, since it is larger than the sum of its proper divisors (54916444).

73221916 is a wasteful number, since it uses less digits than its factorization.

73221916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18305483 (or 18305481 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 73221916 is about 8556.9805422240. The cubic root of 73221916 is about 418.3569899622.

The spelling of 73221916 in words is "seventy-three million, two hundred twenty-one thousand, nine hundred sixteen".