222351872 has 30 divisors (see below), whose sum is σ = 444944643. Its totient is φ = 111007232.

The previous prime is 222351869. The next prime is 222351911. The reversal of 222351872 is 278153222.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 111175936 + 111175936 = 10544^2 + 10544^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10544.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 337079 + ... + 337737.

Almost surely, 2^222351872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222351872

222351872 is an abundant number, since it is smaller than the sum of its proper divisors (222592771).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222351872 is an frugal number, since it uses more digits than its factorization.

222351872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336 (or 661 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 222351872 is about 14911.4678016619. The cubic root of 222351872 is about 605.8246360173.

Multiplying 222351872 by its sum of digits (32), we get a square (7115259904 = 84352²).

222351872 divided by its sum of digits (32) gives a palindrome (6948496).

The spelling of 222351872 in words is "two hundred twenty-two million, three hundred fifty-one thousand, eight hundred seventy-two".