73213012 has 6 divisors (see below), whose sum is σ = 128122778. Its totient is φ = 36606504.

The previous prime is 73213009. The next prime is 73213031. The reversal of 73213012 is 21031237.

It can be written as a sum of positive squares in only one way, i.e., 50211396 + 23001616 = 7086^2 + 4796^2 .

It is a super-2 number, since 2×73213012² = 10720290252224288, which contains 22 as substring.

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, 9151623 + ... + 9151630.

Almost surely, 2^73213012 is an apocalyptic number.

It is an amenable number.

73213012 is a deficient number, since it is larger than the sum of its proper divisors (54909766).

73213012 is a wasteful number, since it uses less digits than its factorization.

73213012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18303257 (or 18303255 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 73213012 is about 8556.4602494256. The cubic root of 73213012 is about 418.3400314619.

Adding to 73213012 its reverse (21031237), we get a palindrome (94244249).

The spelling of 73213012 in words is "seventy-three million, two hundred thirteen thousand, twelve".