33215312212 has 12 divisors (see below), whose sum is σ = 59223528756. Its totient is φ = 16294304000.

The previous prime is 33215312209. The next prime is 33215312219. The reversal of 33215312212 is 21221351233.

It can be written as a sum of positive squares in 2 ways, for example, as 24889479696 + 8325832516 = 157764^2 + 91246^2 .

It is a super-3 number, since 3×33215312212³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33215312219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78337789 + ... + 78338212.

It is an arithmetic number, because the mean of its divisors is an integer number (4935294063).

Almost surely, 2^33215312212 is an apocalyptic number.

It is an amenable number.

33215312212 is a deficient number, since it is larger than the sum of its proper divisors (26008216544).

33215312212 is a wasteful number, since it uses less digits than its factorization.

33215312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156676058 (or 156676056 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

Adding to 33215312212 its reverse (21221351233), we get a palindrome (54436663445).

The spelling of 33215312212 in words is "thirty-three billion, two hundred fifteen million, three hundred twelve thousand, two hundred twelve".