72802271221 has 16 divisors (see below), whose sum is σ = 74733278400. Its totient is φ = 70900777728.

The previous prime is 72802271219. The next prime is 72802271239. The reversal of 72802271221 is 12217220827.

It is a cyclic number.

It is not a de Polignac number, because 72802271221 - 2¹ = 72802271219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72802271281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2057245 + ... + 2092333.

It is an arithmetic number, because the mean of its divisors is an integer number (4670829900).

Almost surely, 2^72802271221 is an apocalyptic number.

It is an amenable number.

72802271221 is a deficient number, since it is larger than the sum of its proper divisors (1931007179).

72802271221 is a wasteful number, since it uses less digits than its factorization.

72802271221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35508.

The product of its (nonzero) digits is 12544, while the sum is 34.

The spelling of 72802271221 in words is "seventy-two billion, eight hundred two million, two hundred seventy-one thousand, two hundred twenty-one".