33143121 has 16 divisors (see below), whose sum is σ = 53565120. Its totient is φ = 20086560.

The previous prime is 33143059. The next prime is 33143147. The reversal of 33143121 is 12134133.

It is not a de Polignac number, because 33143121 - 2¹⁸ = 32880977 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33143094 and 33143103.

It is not an unprimeable number, because it can be changed into a prime (33144121) 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, 55500 + ... + 56093.

It is an arithmetic number, because the mean of its divisors is an integer number (3347820).

Almost surely, 2^33143121 is an apocalyptic number.

It is an amenable number.

33143121 is a deficient number, since it is larger than the sum of its proper divisors (20421999).

33143121 is a wasteful number, since it uses less digits than its factorization.

33143121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111613 (or 111607 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 33143121 is about 5757.0062532535. The cubic root of 33143121 is about 321.2164667971.

Adding to 33143121 its reverse (12134133), we get a palindrome (45277254).

The spelling of 33143121 in words is "thirty-three million, one hundred forty-three thousand, one hundred twenty-one".