21322269 has 12 divisors (see below), whose sum is σ = 31025436. Its totient is φ = 14110272.

The previous prime is 21322241. The next prime is 21322277. The reversal of 21322269 is 96222312.

It can be written as a sum of positive squares in 2 ways, for example, as 5616900 + 15705369 = 2370^2 + 3963^2 .

It is not a de Polignac number, because 21322269 - 2¹⁶ = 21256733 is a prime.

It is a super-2 number, since 2×21322269² = 909278310616722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7414 + ... + 9879.

It is an arithmetic number, because the mean of its divisors is an integer number (2585453).

Almost surely, 2^21322269 is an apocalyptic number.

It is an amenable number.

21322269 is a deficient number, since it is larger than the sum of its proper divisors (9703167).

21322269 is a wasteful number, since it uses less digits than its factorization.

21322269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17436 (or 17433 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 21322269 is about 4617.6042489585. The cubic root of 21322269 is about 277.2965540721.

The spelling of 21322269 in words is "twenty-one million, three hundred twenty-two thousand, two hundred sixty-nine".