33313812 has 96 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 8724480.

The previous prime is 33313799. The next prime is 33313831. The reversal of 33313812 is 21831333.

It is a super-2 number, since 2×33313812² = 2219620139942688, 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 31 ways as a sum of consecutive naturals, for example, 58264 + ... + 58832.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^33313812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33313812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263040).

33313812 is an abundant number, since it is smaller than the sum of its proper divisors (63212268).

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

33313812 is a wasteful number, since it uses less digits than its factorization.

33313812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 639 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 33313812 is about 5771.8118472452. The cubic root of 33313812 is about 321.7669571332.

The spelling of 33313812 in words is "thirty-three million, three hundred thirteen thousand, eight hundred twelve".