222420081 has 16 divisors (see below), whose sum is σ = 319939200. Its totient is φ = 136631040.

The previous prime is 222420043. The next prime is 222420083. The reversal of 222420081 is 180024222.

It is a happy number.

222420081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222420081 - 2⁶ = 222420017 is a prime.

It is a super-2 number, since 2×222420081² = 98941384864093122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (222420083) 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, 18601 + ... + 28121.

It is an arithmetic number, because the mean of its divisors is an integer number (19996200).

Almost surely, 2^222420081 is an apocalyptic number.

It is an amenable number.

222420081 is a deficient number, since it is larger than the sum of its proper divisors (97519119).

222420081 is a wasteful number, since it uses less digits than its factorization.

222420081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10136.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 222420081 is about 14913.7547586113. The cubic root of 222420081 is about 605.8865775809.

The spelling of 222420081 in words is "two hundred twenty-two million, four hundred twenty thousand, eighty-one".