33023021 has 4 divisors (see below), whose sum is σ = 33564444. Its totient is φ = 32481600.

The previous prime is 33023017. The next prime is 33023033. The reversal of 33023021 is 12032033.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7155625 + 25867396 = 2675^2 + 5086^2 .

It is a cyclic number.

It is not a de Polignac number, because 33023021 - 2² = 33023017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33022987 and 33023005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33023041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270620 + ... + 270741.

It is an arithmetic number, because the mean of its divisors is an integer number (8391111).

Almost surely, 2^33023021 is an apocalyptic number.

It is an amenable number.

33023021 is a deficient number, since it is larger than the sum of its proper divisors (541423).

33023021 is an equidigital number, since it uses as much as digits as its factorization.

33023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541422.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 33023021 is about 5746.5660180668. The cubic root of 33023021 is about 320.8280021752.

Adding to 33023021 its reverse (12032033), we get a palindrome (45055054).

The spelling of 33023021 in words is "thirty-three million, twenty-three thousand, twenty-one".