33121422 has 48 divisors (see below), whose sum is σ = 75057840. Its totient is φ = 10542336.

The previous prime is 33121411. The next prime is 33121441. The reversal of 33121422 is 22412133.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 33121395 and 33121404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55558 + ... + 56150.

It is an arithmetic number, because the mean of its divisors is an integer number (1563705).

Almost surely, 2^33121422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33121422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37528920).

33121422 is an abundant number, since it is smaller than the sum of its proper divisors (41936418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33121422 is a wasteful number, since it uses less digits than its factorization.

33121422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 734 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 33121422 is about 5755.1213714395. The cubic root of 33121422 is about 321.1463507109.

Adding to 33121422 its reverse (22412133), we get a palindrome (55533555).

The spelling of 33121422 in words is "thirty-three million, one hundred twenty-one thousand, four hundred twenty-two".