33755921 has 2 divisors, whose sum is σ = 33755922. Its totient is φ = 33755920.

The previous prime is 33755879. The next prime is 33755923. The reversal of 33755921 is 12955733.

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., 29855296 + 3900625 = 5464^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 33755921 - 2¹⁸ = 33493777 is a prime.

It is a super-2 number, since 2×33755921² = 2278924405116482, which contains 22 as substring.

Together with 33755923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33755923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16877960 + 16877961.

It is an arithmetic number, because the mean of its divisors is an integer number (16877961).

Almost surely, 2^33755921 is an apocalyptic number.

It is an amenable number.

33755921 is a deficient number, since it is larger than the sum of its proper divisors (1).

33755921 is an equidigital number, since it uses as much as digits as its factorization.

33755921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 35.

The square root of 33755921 is about 5809.9845955045. The cubic root of 33755921 is about 323.1841007817.

The spelling of 33755921 in words is "thirty-three million, seven hundred fifty-five thousand, nine hundred twenty-one".