33161825 has 12 divisors (see below), whose sum is σ = 42124908. Its totient is φ = 25881600.

The previous prime is 33161803. The next prime is 33161827. The reversal of 33161825 is 52816133.

It can be written as a sum of positive squares in 6 ways, for example, as 1442401 + 31719424 = 1201^2 + 5632^2 .

It is not a de Polignac number, because 33161825 - 2²⁴ = 16384609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33161827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15152 + ... + 17201.

It is an arithmetic number, because the mean of its divisors is an integer number (3510409).

Almost surely, 2^33161825 is an apocalyptic number.

It is an amenable number.

33161825 is a deficient number, since it is larger than the sum of its proper divisors (8963083).

33161825 is a wasteful number, since it uses less digits than its factorization.

33161825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32404 (or 32399 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 33161825 is about 5758.6304795498. The cubic root of 33161825 is about 321.2768805700.

Adding to 33161825 its reverse (52816133), we get a palindrome (85977958).

The spelling of 33161825 in words is "thirty-three million, one hundred sixty-one thousand, eight hundred twenty-five".