33160021 has 12 divisors (see below), whose sum is σ = 35351820. Its totient is φ = 31048640.

The previous prime is 33160019. The next prime is 33160037. The reversal of 33160021 is 12006133.

It can be written as a sum of positive squares in 2 ways, for example, as 8059921 + 25100100 = 2839^2 + 5010^2 .

It is not a de Polignac number, because 33160021 - 2¹ = 33160019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33159977 and 33160004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33160091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198480 + ... + 198646.

It is an arithmetic number, because the mean of its divisors is an integer number (2945985).

Almost surely, 2^33160021 is an apocalyptic number.

It is an amenable number.

33160021 is a deficient number, since it is larger than the sum of its proper divisors (2191799).

33160021 is an equidigital number, since it uses as much as digits as its factorization.

33160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 33160021 is about 5758.4738429553. The cubic root of 33160021 is about 321.2710546542.

Adding to 33160021 its reverse (12006133), we get a palindrome (45166154).

The spelling of 33160021 in words is "thirty-three million, one hundred sixty thousand, twenty-one".