33113421 has 16 divisors (see below), whose sum is σ = 53517120. Its totient is φ = 20068560.

The previous prime is 33113417. The next prime is 33113441. The reversal of 33113421 is 12431133.

It is not a de Polignac number, because 33113421 - 2² = 33113417 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33113394 and 33113403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33113441) 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, 55450 + ... + 56043.

It is an arithmetic number, because the mean of its divisors is an integer number (3344820).

Almost surely, 2^33113421 is an apocalyptic number.

It is an amenable number.

33113421 is a deficient number, since it is larger than the sum of its proper divisors (20403699).

33113421 is a wasteful number, since it uses less digits than its factorization.

33113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111513 (or 111507 counting only the distinct ones).

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

The square root of 33113421 is about 5754.4262094496. The cubic root of 33113421 is about 321.1204893124.

Adding to 33113421 its reverse (12431133), we get a palindrome (45544554).

The spelling of 33113421 in words is "thirty-three million, one hundred thirteen thousand, four hundred twenty-one".