40021333 has 4 divisors (see below), whose sum is σ = 43659648. Its totient is φ = 36383020.

The previous prime is 40021313. The next prime is 40021337. The reversal of 40021333 is 33312004.

40021333 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40021333 - 2¹⁷ = 39890261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1819141 + ... + 1819162.

It is an arithmetic number, because the mean of its divisors is an integer number (10914912).

Almost surely, 2^40021333 is an apocalyptic number.

It is an amenable number.

40021333 is a deficient number, since it is larger than the sum of its proper divisors (3638315).

40021333 is a wasteful number, since it uses less digits than its factorization.

40021333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3638314.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 40021333 is about 6326.2416172638. The cubic root of 40021333 is about 342.0559767249.

Adding to 40021333 its reverse (33312004), we get a palindrome (73333337).

It can be divided in two parts, 4002 and 1333, that added together give a palindrome (5335).

The spelling of 40021333 in words is "forty million, twenty-one thousand, three hundred thirty-three".