33122981 has 2 divisors, whose sum is σ = 33122982. Its totient is φ = 33122980.

The previous prime is 33122977. The next prime is 33122983. The reversal of 33122981 is 18922133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 4553956 = 5345^2 + 2134^2 .

It is a cyclic number.

It is not a de Polignac number, because 33122981 - 2² = 33122977 is a prime.

It is a super-2 number, since 2×33122981² = 2194263740652722, which contains 22 as substring.

Together with 33122983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33122983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16561490 + 16561491.

It is an arithmetic number, because the mean of its divisors is an integer number (16561491).

Almost surely, 2^33122981 is an apocalyptic number.

It is an amenable number.

33122981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33122981 is an equidigital number, since it uses as much as digits as its factorization.

33122981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 33122981 is about 5755.2568144263. The cubic root of 33122981 is about 321.1513893363.

The spelling of 33122981 in words is "thirty-three million, one hundred twenty-two thousand, nine hundred eighty-one".