33420281 has 2 divisors, whose sum is σ = 33420282. Its totient is φ = 33420280.

The previous prime is 33420271. The next prime is 33420293. The reversal of 33420281 is 18202433.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33408400 + 11881 = 5780^2 + 109^2 .

It is an emirp because it is prime and its reverse (18202433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33420281 - 2⁶ = 33420217 is a prime.

It is a super-2 number, since 2×33420281² = 2233830364237922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33420241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16710140 + 16710141.

It is an arithmetic number, because the mean of its divisors is an integer number (16710141).

Almost surely, 2^33420281 is an apocalyptic number.

It is an amenable number.

33420281 is a deficient number, since it is larger than the sum of its proper divisors (1).

33420281 is an equidigital number, since it uses as much as digits as its factorization.

33420281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 33420281 is about 5781.0276768063. The cubic root of 33420281 is about 322.1093754178.

The spelling of 33420281 in words is "thirty-three million, four hundred twenty thousand, two hundred eighty-one".