33243231 has 16 divisors (see below), whose sum is σ = 51488768. Its totient is φ = 18684000.

The previous prime is 33243229. The next prime is 33243233. The reversal of 33243231 is 13234233.

It is an interprime number because it is at equal distance from previous prime (33243229) and next prime (33243233).

It is not a de Polignac number, because 33243231 - 2¹ = 33243229 is a prime.

It is a super-2 number, since 2×33243231² = 2210224814638722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33243198 and 33243207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33243233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11695 + ... + 14256.

It is an arithmetic number, because the mean of its divisors is an integer number (3218048).

Almost surely, 2^33243231 is an apocalyptic number.

33243231 is a deficient number, since it is larger than the sum of its proper divisors (18245537).

33243231 is a wasteful number, since it uses less digits than its factorization.

33243231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26022.

The product of its digits is 1296, while the sum is 21.

The square root of 33243231 is about 5765.6943207215. The cubic root of 33243231 is about 321.5395570457.

Adding to 33243231 its reverse (13234233), we get a palindrome (46477464).

It can be divided in two parts, 3324 and 3231, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 33243231 in words is "thirty-three million, two hundred forty-three thousand, two hundred thirty-one".