33320425 has 12 divisors (see below), whose sum is σ = 43748316. Its totient is φ = 25088000.

The previous prime is 33320407. The next prime is 33320429. The reversal of 33320425 is 52402333.

It can be written as a sum of positive squares in 6 ways, for example, as 4932841 + 28387584 = 2221^2 + 5328^2 .

It is not a de Polignac number, because 33320425 - 2¹³ = 33312233 is a prime.

It is a super-2 number, since 2×33320425² = 2220501444361250, 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 = 33320396 and 33320405.

It is not an unprimeable number, because it can be changed into a prime (33320429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38776 + ... + 39625.

It is an arithmetic number, because the mean of its divisors is an integer number (3645693).

Almost surely, 2^33320425 is an apocalyptic number.

It is an amenable number.

33320425 is a deficient number, since it is larger than the sum of its proper divisors (10427891).

33320425 is a wasteful number, since it uses less digits than its factorization.

33320425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78428 (or 78423 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 22.

The square root of 33320425 is about 5772.3846891904. The cubic root of 33320425 is about 321.7882466422.

Adding to 33320425 its reverse (52402333), we get a palindrome (85722758).

The spelling of 33320425 in words is "thirty-three million, three hundred twenty thousand, four hundred twenty-five".