40021331 has 8 divisors (see below), whose sum is σ = 45818880. Its totient is φ = 34243848.

The previous prime is 40021313. The next prime is 40021337. The reversal of 40021331 is 13312004.

40021331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40021331 - 2¹⁰ = 40020307 is a prime.

It is a super-2 number, since 2×40021331² = 3203413870023122, which contains 22 as substring.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 461 + ... + 8958.

It is an arithmetic number, because the mean of its divisors is an integer number (5727360).

Almost surely, 2^40021331 is an apocalyptic number.

40021331 is a deficient number, since it is larger than the sum of its proper divisors (5797549).

40021331 is an equidigital number, since it uses as much as digits as its factorization.

40021331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10033.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 40021331 is about 6326.2414591920. The cubic root of 40021331 is about 342.0559710270.

Adding to 40021331 its reverse (13312004), we get a palindrome (53333335).

The spelling of 40021331 in words is "forty million, twenty-one thousand, three hundred thirty-one".