21233169 has 6 divisors (see below), whose sum is σ = 30670146. Its totient is φ = 14155440.

The previous prime is 21233161. The next prime is 21233183. The reversal of 21233169 is 96133212.

21233169 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 20793600 + 439569 = 4560^2 + 663^2 .

It is not a de Polignac number, because 21233169 - 2³ = 21233161 is a prime.

It is a super-2 number, since 2×21233169² = 901694931565122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21233161) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 1179612 + ... + 1179629.

It is an arithmetic number, because the mean of its divisors is an integer number (5111691).

Almost surely, 2^21233169 is an apocalyptic number.

It is an amenable number.

21233169 is a deficient number, since it is larger than the sum of its proper divisors (9436977).

21233169 is a wasteful number, since it uses less digits than its factorization.

21233169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359247 (or 2359244 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 21233169 is about 4607.9462887495. The cubic root of 21233169 is about 276.9097656885.

The spelling of 21233169 in words is "twenty-one million, two hundred thirty-three thousand, one hundred sixty-nine".