33143224 has 8 divisors (see below), whose sum is σ = 62143560. Its totient is φ = 16571608.

The previous prime is 33143213. The next prime is 33143233. The reversal of 33143224 is 42234133.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×33143224² = 2196946594228352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33143195 and 33143204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2071444 + ... + 2071459.

It is an arithmetic number, because the mean of its divisors is an integer number (7767945).

Almost surely, 2^33143224 is an apocalyptic number.

It is an amenable number.

33143224 is a deficient number, since it is larger than the sum of its proper divisors (29000336).

33143224 is a wasteful number, since it uses less digits than its factorization.

33143224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142909 (or 4142905 counting only the distinct ones).

The product of its digits is 1728, while the sum is 22.

The square root of 33143224 is about 5757.0151988682. The cubic root of 33143224 is about 321.2167995485.

Adding to 33143224 its reverse (42234133), we get a palindrome (75377357).

Subtracting 33143224 from its reverse (42234133), we obtain a palindrome (9090909).

The spelling of 33143224 in words is "thirty-three million, one hundred forty-three thousand, two hundred twenty-four".