33344021 has 4 divisors (see below), whose sum is σ = 35305452. Its totient is φ = 31382592.

The previous prime is 33344011. The next prime is 33344057. The reversal of 33344021 is 12044333.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12044333 = 7 ⋅1720619.

It can be written as a sum of positive squares in 2 ways, for example, as 11122225 + 22221796 = 3335^2 + 4714^2 .

It is a cyclic number.

It is not a de Polignac number, because 33344021 - 2¹⁰ = 33342997 is a prime.

It is a super-2 number, since 2×33344021² = 2223647472896882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33343984 and 33344002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33344011) 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, 980690 + ... + 980723.

It is an arithmetic number, because the mean of its divisors is an integer number (8826363).

Almost surely, 2^33344021 is an apocalyptic number.

It is an amenable number.

33344021 is a deficient number, since it is larger than the sum of its proper divisors (1961431).

33344021 is a wasteful number, since it uses less digits than its factorization.

33344021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961430.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 33344021 is about 5774.4281968001. The cubic root of 33344021 is about 321.8641872888.

Adding to 33344021 its reverse (12044333), we get a palindrome (45388354).

The spelling of 33344021 in words is "thirty-three million, three hundred forty-four thousand, twenty-one".