33212140 has 24 divisors (see below), whose sum is σ = 75111120. Its totient is φ = 12262848.

The previous prime is 33212131. The next prime is 33212141. The reversal of 33212140 is 4121233.

It is a happy number.

It is a super-2 number, since 2×33212140² = 2206092486759200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33212141) 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, 63610 + ... + 64129.

It is an arithmetic number, because the mean of its divisors is an integer number (3129630).

Almost surely, 2^33212140 is an apocalyptic number.

It is an amenable number.

33212140 is an abundant number, since it is smaller than the sum of its proper divisors (41898980).

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

33212140 is a wasteful number, since it uses less digits than its factorization.

33212140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127761 (or 127759 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 33212140 is about 5762.9974839488. The cubic root of 33212140 is about 321.4392849574.

Adding to 33212140 its reverse (4121233), we get a palindrome (37333373).

The spelling of 33212140 in words is "thirty-three million, two hundred twelve thousand, one hundred forty".