72523212 has 24 divisors (see below), whose sum is σ = 171748416. Its totient is φ = 23813328.

The previous prime is 72523201. The next prime is 72523267. The reversal of 72523212 is 21232527.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 44298 + ... + 45905.

It is an arithmetic number, because the mean of its divisors is an integer number (7156184).

Almost surely, 2^72523212 is an apocalyptic number.

It is an amenable number.

72523212 is an abundant number, since it is smaller than the sum of its proper divisors (99225204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72523212 is a wasteful number, since it uses less digits than its factorization.

72523212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90277 (or 90275 counting only the distinct ones).

The product of its digits is 1680, while the sum is 24.

The square root of 72523212 is about 8516.0561294534. The cubic root of 72523212 is about 417.0220416323.

Adding to 72523212 its reverse (21232527), we get a palindrome (93755739).

The spelling of 72523212 in words is "seventy-two million, five hundred twenty-three thousand, two hundred twelve".