72330212 has 6 divisors (see below), whose sum is σ = 126577878. Its totient is φ = 36165104.

The previous prime is 72330199. The next prime is 72330217. The reversal of 72330212 is 21203327.

It can be written as a sum of positive squares in only one way, i.e., 64899136 + 7431076 = 8056^2 + 2726^2 .

It is not an unprimeable number, because it can be changed into a prime (72330217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9041273 + ... + 9041280.

It is an arithmetic number, because the mean of its divisors is an integer number (21096313).

Almost surely, 2^72330212 is an apocalyptic number.

It is an amenable number.

72330212 is a deficient number, since it is larger than the sum of its proper divisors (54247666).

72330212 is a wasteful number, since it uses less digits than its factorization.

72330212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18082557 (or 18082555 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 72330212 is about 8504.7170440879. The cubic root of 72330212 is about 416.6517842862.

Adding to 72330212 its reverse (21203327), we get a palindrome (93533539).

The spelling of 72330212 in words is "seventy-two million, three hundred thirty thousand, two hundred twelve".