33143421 has 8 divisors (see below), whose sum is σ = 46790784. Its totient is φ = 20795840.

The previous prime is 33143419. The next prime is 33143431. The reversal of 33143421 is 12434133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33143421 - 2¹ = 33143419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33143401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324885 + ... + 324986.

It is an arithmetic number, because the mean of its divisors is an integer number (5848848).

Almost surely, 2^33143421 is an apocalyptic number.

It is an amenable number.

33143421 is a deficient number, since it is larger than the sum of its proper divisors (13647363).

33143421 is a wasteful number, since it uses less digits than its factorization.

33143421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649891.

The product of its digits is 864, while the sum is 21.

The square root of 33143421 is about 5757.0323084033. The cubic root of 33143421 is about 321.2174359741.

Adding to 33143421 its reverse (12434133), we get a palindrome (45577554).

The spelling of 33143421 in words is "thirty-three million, one hundred forty-three thousand, four hundred twenty-one".