33216426 has 32 divisors (see below), whose sum is σ = 76363200. Its totient is φ = 10689840.

The previous prime is 33216409. The next prime is 33216431. The reversal of 33216426 is 62461233.

It is a super-2 number, since 2×33216426² = 2206661912426952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 33216426.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9040 + ... + 12171.

It is an arithmetic number, because the mean of its divisors is an integer number (2386350).

Almost surely, 2^33216426 is an apocalyptic number.

33216426 is an abundant number, since it is smaller than the sum of its proper divisors (43146774).

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

33216426 is a wasteful number, since it uses less digits than its factorization.

33216426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21251 (or 21245 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 33216426 is about 5763.3693270517. The cubic root of 33216426 is about 321.4531115232.

Adding to 33216426 its reverse (62461233), we get a palindrome (95677659).

The spelling of 33216426 in words is "thirty-three million, two hundred sixteen thousand, four hundred twenty-six".