33780225 has 12 divisors (see below), whose sum is σ = 55850096. Its totient is φ = 18016080.

The previous prime is 33780209. The next prime is 33780251. The reversal of 33780225 is 52208733.

It is not a de Polignac number, because 33780225 - 2⁴ = 33780209 is a prime.

It is a super-2 number, since 2×33780225² = 2282207202101250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33780192 and 33780201.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225127 + ... + 225276.

Almost surely, 2^33780225 is an apocalyptic number.

It is an amenable number.

33780225 is a deficient number, since it is larger than the sum of its proper divisors (22069871).

33780225 is a wasteful number, since it uses less digits than its factorization.

33780225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450416 (or 450411 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 33780225 is about 5812.0757909718. The cubic root of 33780225 is about 323.2616455186.

Adding to 33780225 its reverse (52208733), we get a palindrome (85988958).

The spelling of 33780225 in words is "thirty-three million, seven hundred eighty thousand, two hundred twenty-five".