73212212 has 6 divisors (see below), whose sum is σ = 128121378. Its totient is φ = 36606104.

The previous prime is 73212169. The next prime is 73212247. The reversal of 73212212 is 21221237.

It can be written as a sum of positive squares in only one way, i.e., 46730896 + 26481316 = 6836^2 + 5146^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9151523 + ... + 9151530.

It is an arithmetic number, because the mean of its divisors is an integer number (21353563).

Almost surely, 2^73212212 is an apocalyptic number.

It is an amenable number.

73212212 is a deficient number, since it is larger than the sum of its proper divisors (54909166).

73212212 is a wasteful number, since it uses less digits than its factorization.

73212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18303057 (or 18303055 counting only the distinct ones).

The product of its digits is 336, while the sum is 20.

The square root of 73212212 is about 8556.4135009944. The cubic root of 73212212 is about 418.3385077198.

Adding to 73212212 its reverse (21221237), we get a palindrome (94433449).

The spelling of 73212212 in words is "seventy-three million, two hundred twelve thousand, two hundred twelve".