33374381 has 4 divisors (see below), whose sum is σ = 33921564. Its totient is φ = 32827200.

The previous prime is 33374351. The next prime is 33374387. The reversal of 33374381 is 18347333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18347333 = 281 ⋅65293.

It can be written as a sum of positive squares in 2 ways, for example, as 9030025 + 24344356 = 3005^2 + 4934^2 .

It is a cyclic number.

It is not a de Polignac number, because 33374381 - 2¹⁰ = 33373357 is a prime.

It is a super-2 number, since 2×33374381² = 2227698614266322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33374387) 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, 273500 + ... + 273621.

It is an arithmetic number, because the mean of its divisors is an integer number (8480391).

Almost surely, 2^33374381 is an apocalyptic number.

It is an amenable number.

33374381 is a deficient number, since it is larger than the sum of its proper divisors (547183).

33374381 is an equidigital number, since it uses as much as digits as its factorization.

33374381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547182.

The product of its digits is 18144, while the sum is 32.

The square root of 33374381 is about 5777.0564303978. The cubic root of 33374381 is about 321.9618443016.

The spelling of 33374381 in words is "thirty-three million, three hundred seventy-four thousand, three hundred eighty-one".