72323520211 has 4 divisors (see below), whose sum is σ = 74656537024. Its totient is φ = 69990503400.

The previous prime is 72323520209. The next prime is 72323520221. The reversal of 72323520211 is 11202532327.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72323520211 - 2¹ = 72323520209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72323520211.

It is not an unprimeable number, because it can be changed into a prime (72323520221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166508360 + ... + 1166508421.

It is an arithmetic number, because the mean of its divisors is an integer number (18664134256).

Almost surely, 2^72323520211 is an apocalyptic number.

72323520211 is a deficient number, since it is larger than the sum of its proper divisors (2333016813).

72323520211 is a wasteful number, since it uses less digits than its factorization.

72323520211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333016812.

The product of its (nonzero) digits is 5040, while the sum is 28.

The spelling of 72323520211 in words is "seventy-two billion, three hundred twenty-three million, five hundred twenty thousand, two hundred eleven".