72220441 has 4 divisors (see below), whose sum is σ = 72267984. Its totient is φ = 72172900.

The previous prime is 72220429. The next prime is 72220451. The reversal of 72220441 is 14402227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72220441 - 2⁹ = 72219929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72220451) 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, 21415 + ... + 24556.

It is an arithmetic number, because the mean of its divisors is an integer number (18066996).

Almost surely, 2^72220441 is an apocalyptic number.

It is an amenable number.

72220441 is a deficient number, since it is larger than the sum of its proper divisors (47543).

72220441 is a wasteful number, since it uses less digits than its factorization.

72220441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47542.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 72220441 is about 8498.2610574164. The cubic root of 72220441 is about 416.4409021928.

Adding to 72220441 its reverse (14402227), we get a palindrome (86622668).

The spelling of 72220441 in words is "seventy-two million, two hundred twenty thousand, four hundred forty-one".