22152321 has 12 divisors (see below), whose sum is σ = 33030400. Its totient is φ = 14291640.

The previous prime is 22152293. The next prime is 22152323. The reversal of 22152321 is 12325122.

It is not a de Polignac number, because 22152321 - 2¹¹ = 22150273 is a prime.

It is a super-3 number, since 3×22152321³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22152294 and 22152303.

It is not an unprimeable number, because it can be changed into a prime (22152323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39421 + ... + 39978.

Almost surely, 2^22152321 is an apocalyptic number.

It is an amenable number.

22152321 is a deficient number, since it is larger than the sum of its proper divisors (10878079).

22152321 is a wasteful number, since it uses less digits than its factorization.

22152321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79436 (or 79433 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 22152321 is about 4706.6252240857. The cubic root of 22152321 is about 280.8491272678.

Adding to 22152321 its reverse (12325122), we get a palindrome (34477443).

The spelling of 22152321 in words is "twenty-two million, one hundred fifty-two thousand, three hundred twenty-one".