33805421 has 4 divisors (see below), whose sum is σ = 36405852. Its totient is φ = 31204992.

The previous prime is 33805417. The next prime is 33805441. The reversal of 33805421 is 12450833.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10176100 + 23629321 = 3190^2 + 4861^2 .

It is not a de Polignac number, because 33805421 - 2² = 33805417 is a prime.

It is a super-2 number, since 2×33805421² = 2285612977974482, 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 (33805441) 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, 1300196 + ... + 1300221.

It is an arithmetic number, because the mean of its divisors is an integer number (9101463).

Almost surely, 2^33805421 is an apocalyptic number.

It is an amenable number.

33805421 is a deficient number, since it is larger than the sum of its proper divisors (2600431).

33805421 is a wasteful number, since it uses less digits than its factorization.

33805421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600430.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 33805421 is about 5814.2429429806. The cubic root of 33805421 is about 323.3419970282.

The spelling of 33805421 in words is "thirty-three million, eight hundred five thousand, four hundred twenty-one".