32222221 has 4 divisors (see below), whose sum is σ = 32244352. Its totient is φ = 32200092.

The previous prime is 32222207. The next prime is 32222231. The reversal of 32222221 is 12222223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 32222221 - 2⁵ = 32222189 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 32222195 and 32222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32222231) 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, 8715 + ... + 11848.

It is an arithmetic number, because the mean of its divisors is an integer number (8061088).

Almost surely, 2^32222221 is an apocalyptic number.

It is an amenable number.

32222221 is a deficient number, since it is larger than the sum of its proper divisors (22131).

32222221 is a wasteful number, since it uses less digits than its factorization.

32222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22130.

The product of its digits is 192, while the sum is 16.

The square root of 32222221 is about 5676.4620143184. The cubic root of 32222221 is about 318.2134196219.

Adding to 32222221 its reverse (12222223), we get a palindrome (44444444).

It can be divided in two parts, 3222222 and 1, that added together give a palindrome (3222223).

The spelling of 32222221 in words is "thirty-two million, two hundred twenty-two thousand, two hundred twenty-one".