33133385 has 4 divisors (see below), whose sum is σ = 39760068. Its totient is φ = 26506704.

The previous prime is 33133381. The next prime is 33133393. The reversal of 33133385 is 58333133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58333133 = 1181 ⋅49393.

It can be written as a sum of positive squares in 2 ways, for example, as 12166144 + 20967241 = 3488^2 + 4579^2 .

It is a cyclic number.

It is not a de Polignac number, because 33133385 - 2² = 33133381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33133381) 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, 3313334 + ... + 3313343.

It is an arithmetic number, because the mean of its divisors is an integer number (9940017).

Almost surely, 2^33133385 is an apocalyptic number.

It is an amenable number.

33133385 is a deficient number, since it is larger than the sum of its proper divisors (6626683).

33133385 is an equidigital number, since it uses as much as digits as its factorization.

33133385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626682.

The product of its digits is 9720, while the sum is 29.

The square root of 33133385 is about 5756.1606127696. The cubic root of 33133385 is about 321.1850105984.

The spelling of 33133385 in words is "thirty-three million, one hundred thirty-three thousand, three hundred eighty-five".