21232322 has 4 divisors (see below), whose sum is σ = 31848486. Its totient is φ = 10616160.

The previous prime is 21232307. The next prime is 21232363. The reversal of 21232322 is 22323212.

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

It can be written as a sum of positive squares in only one way, i.e., 17147881 + 4084441 = 4141^2 + 2021^2 .

It is a super-2 number, since 2×21232322² = 901622995023368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21232322.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5308079 + ... + 5308082.

Almost surely, 2^21232322 is an apocalyptic number.

21232322 is a deficient number, since it is larger than the sum of its proper divisors (10616164).

21232322 is a wasteful number, since it uses less digits than its factorization.

21232322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616163.

The product of its digits is 288, while the sum is 17.

The square root of 21232322 is about 4607.8543813797. The cubic root of 21232322 is about 276.9060836241.

Adding to 21232322 its reverse (22323212), we get a palindrome (43555534).

The spelling of 21232322 in words is "twenty-one million, two hundred thirty-two thousand, three hundred twenty-two".