33421081 has 6 divisors (see below), whose sum is σ = 34000682. Its totient is φ = 32851200.

The previous prime is 33421067. The next prime is 33421097. The reversal of 33421081 is 18012433.

It can be written as a sum of positive squares in only one way, i.e., 31416025 + 2005056 = 5605^2 + 1416^2 .

It is a de Polignac number, because none of the positive numbers 2^k-33421081 is a prime.

It is a super-2 number, since 2×33421081² = 2233937310417122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33421181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1320 + ... + 8281.

Almost surely, 2^33421081 is an apocalyptic number.

It is an amenable number.

33421081 is a deficient number, since it is larger than the sum of its proper divisors (579601).

33421081 is an frugal number, since it uses more digits than its factorization.

33421081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9719 (or 9660 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 33421081 is about 5781.0968682422. The cubic root of 33421081 is about 322.1119455682. Note that the first 3 decimals are identical.

The spelling of 33421081 in words is "thirty-three million, four hundred twenty-one thousand, eighty-one".