33061921 has 2 divisors, whose sum is σ = 33061922. Its totient is φ = 33061920.

The previous prime is 33061913. The next prime is 33061927. The reversal of 33061921 is 12916033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25361296 + 7700625 = 5036^2 + 2775^2 .

It is a cyclic number.

It is not a de Polignac number, because 33061921 - 2³ = 33061913 is a prime.

It is not a weakly prime, because it can be changed into another prime (33061927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16530960 + 16530961.

It is an arithmetic number, because the mean of its divisors is an integer number (16530961).

Almost surely, 2^33061921 is an apocalyptic number.

It is an amenable number.

33061921 is a deficient number, since it is larger than the sum of its proper divisors (1).

33061921 is an equidigital number, since it uses as much as digits as its factorization.

33061921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 33061921 is about 5749.9496519535. The cubic root of 33061921 is about 320.9539275821.

Adding to 33061921 its reverse (12916033), we get a palindrome (45977954).

The spelling of 33061921 in words is "thirty-three million, sixty-one thousand, nine hundred twenty-one".