222421043 has 4 divisors (see below), whose sum is σ = 239530368. Its totient is φ = 205311720.

The previous prime is 222421027. The next prime is 222421093. The reversal of 222421043 is 340124222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222421043 - 2⁴ = 222421027 is a prime.

It is a super-2 number, since 2×222421043² = 98942240738415698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222421093) 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, 8554643 + ... + 8554668.

It is an arithmetic number, because the mean of its divisors is an integer number (59882592).

Almost surely, 2^222421043 is an apocalyptic number.

222421043 is a deficient number, since it is larger than the sum of its proper divisors (17109325).

222421043 is a wasteful number, since it uses less digits than its factorization.

222421043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17109324.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 222421043 is about 14913.7870106824. The cubic root of 222421043 is about 605.8874510963.

Adding to 222421043 its reverse (340124222), we get a palindrome (562545265).

The spelling of 222421043 in words is "two hundred twenty-two million, four hundred twenty-one thousand, forty-three".