33336381 has 16 divisors (see below), whose sum is σ = 48021120. Its totient is φ = 20448960.

The previous prime is 33336379. The next prime is 33336383. The reversal of 33336381 is 18363333.

It is an interprime number because it is at equal distance from previous prime (33336379) and next prime (33336383).

It is not a de Polignac number, because 33336381 - 2¹ = 33336379 is a prime.

It is a super-3 number, since 3×33336381³ (a number of 24 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 (33336383) 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, 12811 + ... + 15191.

It is an arithmetic number, because the mean of its divisors is an integer number (3001320).

Almost surely, 2^33336381 is an apocalyptic number.

It is an amenable number.

33336381 is a deficient number, since it is larger than the sum of its proper divisors (14684739).

33336381 is a wasteful number, since it uses less digits than its factorization.

33336381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756.

The product of its digits is 11664, while the sum is 30.

The square root of 33336381 is about 5773.7666215392. The cubic root of 33336381 is about 321.8396028690.

The spelling of 33336381 in words is "thirty-three million, three hundred thirty-six thousand, three hundred eighty-one".