33243664 has 20 divisors (see below), whose sum is σ = 65781504. Its totient is φ = 16267808.

The previous prime is 33243643. The next prime is 33243677. The reversal of 33243664 is 46634233.

It is a super-2 number, since 2×33243664² = 2210282392289792, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21352 + ... + 22855.

Almost surely, 2^33243664 is an apocalyptic number.

It is an amenable number.

33243664 is a deficient number, since it is larger than the sum of its proper divisors (32537840).

33243664 is a wasteful number, since it uses less digits than its factorization.

33243664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44262 (or 44256 counting only the distinct ones).

The product of its digits is 31104, while the sum is 31.

The square root of 33243664 is about 5765.7318702833. The cubic root of 33243664 is about 321.5409530795.

Adding to 33243664 its reverse (46634233), we get a palindrome (79877897).

The spelling of 33243664 in words is "thirty-three million, two hundred forty-three thousand, six hundred sixty-four".