33423143 has 4 divisors (see below), whose sum is σ = 35994168. Its totient is φ = 30852120.

The previous prime is 33423121. The next prime is 33423197. The reversal of 33423143 is 34132433.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 33423143 - 2¹² = 33419047 is a prime.

It is a super-2 number, since 2×33423143² = 2234212975996898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33423113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285493 + ... + 1285518.

It is an arithmetic number, because the mean of its divisors is an integer number (8998542).

Almost surely, 2^33423143 is an apocalyptic number.

33423143 is a deficient number, since it is larger than the sum of its proper divisors (2571025).

33423143 is a wasteful number, since it uses less digits than its factorization.

33423143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571024.

The product of its digits is 2592, while the sum is 23.

The square root of 33423143 is about 5781.2752053505. The cubic root of 33423143 is about 322.1185699417.

Adding to 33423143 its reverse (34132433), we get a palindrome (67555576).

The spelling of 33423143 in words is "thirty-three million, four hundred twenty-three thousand, one hundred forty-three".