40021353 has 12 divisors (see below), whose sum is σ = 60851440. Its totient is φ = 25276536.

The previous prime is 40021339. The next prime is 40021361. The reversal of 40021353 is 35312004.

40021353 is a `hidden beast` number, since 400 + 213 + 53 = 666.

40021353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40021353 - 2⁴ = 40021337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40021313) 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 11 ways as a sum of consecutive naturals, for example, 116851 + ... + 117192.

Almost surely, 2^40021353 is an apocalyptic number.

It is an amenable number.

40021353 is a deficient number, since it is larger than the sum of its proper divisors (20830087).

40021353 is a wasteful number, since it uses less digits than its factorization.

40021353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234068 (or 234065 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 40021353 is about 6326.2431979809. The cubic root of 40021353 is about 342.0560337039.

Adding to 40021353 its reverse (35312004), we get a palindrome (75333357).

The spelling of 40021353 in words is "forty million, twenty-one thousand, three hundred fifty-three".