72221411 has 4 divisors (see below), whose sum is σ = 72243000. Its totient is φ = 72199824.

The previous prime is 72221399. The next prime is 72221419. The reversal of 72221411 is 11412227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11412227 = 41 ⋅278347.

It is a cyclic number.

It is not a de Polignac number, because 72221411 - 2¹⁸ = 71959267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72221419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4586 + ... + 12863.

It is an arithmetic number, because the mean of its divisors is an integer number (18060750).

Almost surely, 2^72221411 is an apocalyptic number.

72221411 is a deficient number, since it is larger than the sum of its proper divisors (21589).

72221411 is a wasteful number, since it uses less digits than its factorization.

72221411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21588.

The product of its digits is 224, while the sum is 20.

The square root of 72221411 is about 8498.3181277239. The cubic root of 72221411 is about 416.4427666044.

Adding to 72221411 its reverse (11412227), we get a palindrome (83633638).

The spelling of 72221411 in words is "seventy-two million, two hundred twenty-one thousand, four hundred eleven".