33572921 has 2 divisors, whose sum is σ = 33572922. Its totient is φ = 33572920.

The previous prime is 33572911. The next prime is 33572927. The reversal of 33572921 is 12927533.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17732521 + 15840400 = 4211^2 + 3980^2 .

It is a cyclic number.

It is not a de Polignac number, because 33572921 - 2⁶ = 33572857 is a prime.

It is a super-2 number, since 2×33572921² = 2254282048944482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33572927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16786460 + 16786461.

It is an arithmetic number, because the mean of its divisors is an integer number (16786461).

Almost surely, 2^33572921 is an apocalyptic number.

It is an amenable number.

33572921 is a deficient number, since it is larger than the sum of its proper divisors (1).

33572921 is an equidigital number, since it uses as much as digits as its factorization.

33572921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 32.

The square root of 33572921 is about 5794.2144420102. The cubic root of 33572921 is about 322.5990193309.

The spelling of 33572921 in words is "thirty-three million, five hundred seventy-two thousand, nine hundred twenty-one".