33330381 has 32 divisors (see below), whose sum is σ = 53465088. Its totient is φ = 18057600.

The previous prime is 33330373. The next prime is 33330433. The reversal of 33330381 is 18303333.

It is not a de Polignac number, because 33330381 - 2³ = 33330373 is a prime.

It is a super-2 number, since 2×33330381² = 2221828595210322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33330371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72705 + ... + 73161.

It is an arithmetic number, because the mean of its divisors is an integer number (1670784).

Almost surely, 2^33330381 is an apocalyptic number.

It is an amenable number.

33330381 is a deficient number, since it is larger than the sum of its proper divisors (20134707).

33330381 is a wasteful number, since it uses less digits than its factorization.

33330381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its (nonzero) digits is 1944, while the sum is 24.

The square root of 33330381 is about 5773.2470066679. The cubic root of 33330381 is about 321.8202930997.

The spelling of 33330381 in words is "thirty-three million, three hundred thirty thousand, three hundred eighty-one".