33222720 has 56 divisors (see below), whose sum is σ = 105485184. Its totient is φ = 8859136.

The previous prime is 33222713. The next prime is 33222727. The reversal of 33222720 is 2722233.

It is an interprime number because it is at equal distance from previous prime (33222713) and next prime (33222727).

It is a super-2 number, since 2×33222720² = 2207498248396800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33222727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16344 + ... + 18263.

It is an arithmetic number, because the mean of its divisors is an integer number (1883664).

Almost surely, 2^33222720 is an apocalyptic number.

33222720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33222720 is an abundant number, since it is smaller than the sum of its proper divisors (72262464).

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

33222720 is a wasteful number, since it uses less digits than its factorization.

33222720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34627 (or 34617 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 21.

The square root of 33222720 is about 5763.9153359500. The cubic root of 33222720 is about 321.4734137085.

Adding to 33222720 its reverse (2722233), we get a palindrome (35944953).

The spelling of 33222720 in words is "thirty-three million, two hundred twenty-two thousand, seven hundred twenty".