33113138 has 4 divisors (see below), whose sum is σ = 49669710. Its totient is φ = 16556568.

The previous prime is 33113131. The next prime is 33113149. The reversal of 33113138 is 83131133.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33097009 + 16129 = 5753^2 + 127^2 .

It is not an unprimeable number, because it can be changed into a prime (33113131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278283 + ... + 8278286.

Almost surely, 2^33113138 is an apocalyptic number.

33113138 is a deficient number, since it is larger than the sum of its proper divisors (16556572).

33113138 is a wasteful number, since it uses less digits than its factorization.

33113138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16556571.

The product of its digits is 648, while the sum is 23.

The square root of 33113138 is about 5754.4016196300. The cubic root of 33113138 is about 321.1195745035.

The spelling of 33113138 in words is "thirty-three million, one hundred thirteen thousand, one hundred thirty-eight".