33221780 has 24 divisors (see below), whose sum is σ = 69981408. Its totient is φ = 13247648.

The previous prime is 33221777. The next prime is 33221807. The reversal of 33221780 is 8712233.

It is a super-2 number, since 2×33221780² = 2207373332736800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4547 + ... + 9333.

It is an arithmetic number, because the mean of its divisors is an integer number (2915892).

Almost surely, 2^33221780 is an apocalyptic number.

It is an amenable number.

33221780 is an abundant number, since it is smaller than the sum of its proper divisors (36759628).

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

33221780 is a wasteful number, since it uses less digits than its factorization.

33221780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5143 (or 5141 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 33221780 is about 5763.8337935787. The cubic root of 33221780 is about 321.4703817687.

The spelling of 33221780 in words is "thirty-three million, two hundred twenty-one thousand, seven hundred eighty".