72220301 has 4 divisors (see below), whose sum is σ = 76468572. Its totient is φ = 67972032.

The previous prime is 72220289. The next prime is 72220327. The reversal of 72220301 is 10302227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10302227 = 13 ⋅792479.

It can be written as a sum of positive squares in 2 ways, for example, as 23290276 + 48930025 = 4826^2 + 6995^2 .

It is a cyclic number.

It is not a de Polignac number, because 72220301 - 2¹⁴ = 72203917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 4248253 = 72220301 / (7 + 2 + 2 + 2 + 0 + 3 + 0 + 1).

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 72220301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72220381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2124110 + ... + 2124143.

It is an arithmetic number, because the mean of its divisors is an integer number (19117143).

Almost surely, 2^72220301 is an apocalyptic number.

It is an amenable number.

72220301 is a deficient number, since it is larger than the sum of its proper divisors (4248271).

72220301 is a wasteful number, since it uses less digits than its factorization.

72220301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248270.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 72220301 is about 8498.2528204332. The cubic root of 72220301 is about 416.4406331011.

Adding to 72220301 its reverse (10302227), we get a palindrome (82522528).

The spelling of 72220301 in words is "seventy-two million, two hundred twenty thousand, three hundred one".