33055138 has 4 divisors (see below), whose sum is σ = 49582710. Its totient is φ = 16527568.

The previous prime is 33055133. The next prime is 33055153. The reversal of 33055138 is 83155033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83155033 = 13 ⋅6396541.

It can be written as a sum of positive squares in only one way, i.e., 17665209 + 15389929 = 4203^2 + 3923^2 .

It is not an unprimeable number, because it can be changed into a prime (33055133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8263783 + ... + 8263786.

Almost surely, 2^33055138 is an apocalyptic number.

33055138 is a deficient number, since it is larger than the sum of its proper divisors (16527572).

33055138 is a wasteful number, since it uses less digits than its factorization.

33055138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16527571.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 33055138 is about 5749.3597904462. The cubic root of 33055138 is about 320.9319770590.

The spelling of 33055138 in words is "thirty-three million, fifty-five thousand, one hundred thirty-eight".