33216972 has 48 divisors (see below), whose sum is σ = 80693760. Its totient is φ = 10625472.

The previous prime is 33216949. The next prime is 33216979. The reversal of 33216972 is 27961233.

It is a happy number.

It is a super-2 number, since 2×33216972² = 2206734457697568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33216979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34603 + ... + 35549.

It is an arithmetic number, because the mean of its divisors is an integer number (1681120).

Almost surely, 2^33216972 is an apocalyptic number.

It is an amenable number.

33216972 is an abundant number, since it is smaller than the sum of its proper divisors (47476788).

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

33216972 is a wasteful number, since it uses less digits than its factorization.

33216972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070 (or 1068 counting only the distinct ones).

The product of its digits is 13608, while the sum is 33.

The square root of 33216972 is about 5763.4166949822. The cubic root of 33216972 is about 321.4548728249.

The spelling of 33216972 in words is "thirty-three million, two hundred sixteen thousand, nine hundred seventy-two".