33325813 has 2 divisors, whose sum is σ = 33325814. Its totient is φ = 33325812.

The previous prime is 33325777. The next prime is 33325819. The reversal of 33325813 is 31852333.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27060804 + 6265009 = 5202^2 + 2503^2 .

It is an emirp because it is prime and its reverse (31852333) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33325813 is a prime.

It is a super-2 number, since 2×33325813² = 2221219624221938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33325819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16662906 + 16662907.

It is an arithmetic number, because the mean of its divisors is an integer number (16662907).

Almost surely, 2^33325813 is an apocalyptic number.

It is an amenable number.

33325813 is a deficient number, since it is larger than the sum of its proper divisors (1).

33325813 is an equidigital number, since it uses as much as digits as its factorization.

33325813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 33325813 is about 5772.8513751871. The cubic root of 33325813 is about 321.8055903749.

The spelling of 33325813 in words is "thirty-three million, three hundred twenty-five thousand, eight hundred thirteen".