73521212 has 24 divisors (see below), whose sum is σ = 133160832. Its totient is φ = 35481600.

The previous prime is 73521199. The next prime is 73521223. The reversal of 73521212 is 21212537.

It is a happy number.

It is a super-2 number, since 2×73521212² = 10810737227897888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83012 + ... + 83892.

It is an arithmetic number, because the mean of its divisors is an integer number (5548368).

Almost surely, 2^73521212 is an apocalyptic number.

It is an amenable number.

73521212 is a deficient number, since it is larger than the sum of its proper divisors (59639620).

73521212 is a wasteful number, since it uses less digits than its factorization.

73521212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1587 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 73521212 is about 8574.4511194595. The cubic root of 73521212 is about 418.9262291732.

Adding to 73521212 its reverse (21212537), we get a palindrome (94733749).

The spelling of 73521212 in words is "seventy-three million, five hundred twenty-one thousand, two hundred twelve".