2171222 has 4 divisors (see below), whose sum is σ = 3256836. Its totient is φ = 1085610.

The previous prime is 2171219. The next prime is 2171231. The reversal of 2171222 is 2221712.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2171222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542804 + ... + 542807.

It is an arithmetic number, because the mean of its divisors is an integer number (814209).

2^2171222 is an apocalyptic number.

2171222 is a deficient number, since it is larger than the sum of its proper divisors (1085614).

2171222 is a wasteful number, since it uses less digits than its factorization.

2171222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085613.

The product of its digits is 112, while the sum is 17.

The square root of 2171222 is about 1473.5067017153. The cubic root of 2171222 is about 129.4895565586.

Adding to 2171222 its reverse (2221712), we get a palindrome (4392934).

The spelling of 2171222 in words is "two million, one hundred seventy-one thousand, two hundred twenty-two".