33106381 has 8 divisors (see below), whose sum is σ = 41275584. Its totient is φ = 25797120.

The previous prime is 33106373. The next prime is 33106399. The reversal of 33106381 is 18360133.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33106381 - 2³ = 33106373 is a prime.

It is a super-2 number, since 2×33106381² = 2192064925834322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33106321) 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, 214900 + ... + 215053.

It is an arithmetic number, because the mean of its divisors is an integer number (5159448).

Almost surely, 2^33106381 is an apocalyptic number.

It is an amenable number.

33106381 is a deficient number, since it is larger than the sum of its proper divisors (8169203).

33106381 is a wasteful number, since it uses less digits than its factorization.

33106381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429971.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 33106381 is about 5753.8144738947. The cubic root of 33106381 is about 321.0977306806.

The spelling of 33106381 in words is "thirty-three million, one hundred six thousand, three hundred eighty-one".