21032222 has 4 divisors (see below), whose sum is σ = 31548336. Its totient is φ = 10516110.

The previous prime is 21032201. The next prime is 21032237. The reversal of 21032222 is 22223012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21032197 and 21032206.

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, 5258054 + ... + 5258057.

It is an arithmetic number, because the mean of its divisors is an integer number (7887084).

Almost surely, 2^21032222 is an apocalyptic number.

21032222 is a deficient number, since it is larger than the sum of its proper divisors (10516114).

21032222 is a wasteful number, since it uses less digits than its factorization.

21032222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10516113.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21032222 is about 4586.0900558101. The cubic root of 21032222 is about 276.0334535519.

Adding to 21032222 its reverse (22223012), we get a palindrome (43255234).

The spelling of 21032222 in words is "twenty-one million, thirty-two thousand, two hundred twenty-two".