222421071 has 4 divisors (see below), whose sum is σ = 296561432. Its totient is φ = 148280712.

The previous prime is 222421027. The next prime is 222421093. The reversal of 222421071 is 170124222.

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

It is not a de Polignac number, because 222421071 - 2¹¹ = 222419023 is a prime.

It is a super-2 number, since 2×222421071² = 98942265649574082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222421021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37070176 + ... + 37070181.

It is an arithmetic number, because the mean of its divisors is an integer number (74140358).

Almost surely, 2^222421071 is an apocalyptic number.

222421071 is a deficient number, since it is larger than the sum of its proper divisors (74140361).

222421071 is an equidigital number, since it uses as much as digits as its factorization.

222421071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74140360.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 222421071 is about 14913.7879494111. The cubic root of 222421071 is about 605.8874765208.

Adding to 222421071 its reverse (170124222), we get a palindrome (392545293).

The spelling of 222421071 in words is "two hundred twenty-two million, four hundred twenty-one thousand, seventy-one".