33057109 has 4 divisors (see below), whose sum is σ = 33083820. Its totient is φ = 33030400.

The previous prime is 33057097. The next prime is 33057161. The reversal of 33057109 is 90175033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90175033 = 13 ⋅6936541.

It can be written as a sum of positive squares in 2 ways, for example, as 908209 + 32148900 = 953^2 + 5670^2 .

It is a cyclic number.

It is not a de Polignac number, because 33057109 - 2¹⁹ = 32532821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33055109) 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, 11404 + ... + 14005.

It is an arithmetic number, because the mean of its divisors is an integer number (8270955).

Almost surely, 2^33057109 is an apocalyptic number.

It is an amenable number.

33057109 is a deficient number, since it is larger than the sum of its proper divisors (26711).

33057109 is a wasteful number, since it uses less digits than its factorization.

33057109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26710.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 33057109 is about 5749.5311982804. The cubic root of 33057109 is about 320.9383557381.

The spelling of 33057109 in words is "thirty-three million, fifty-seven thousand, one hundred nine".