40021153 has 4 divisors (see below), whose sum is σ = 40058928. Its totient is φ = 39983380.

The previous prime is 40021151. The next prime is 40021159. The reversal of 40021153 is 35112004.

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 40021153 - 2¹ = 40021151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40021151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17251 + ... + 19432.

It is an arithmetic number, because the mean of its divisors is an integer number (10014732).

Almost surely, 2^40021153 is an apocalyptic number.

It is an amenable number.

40021153 is a deficient number, since it is larger than the sum of its proper divisors (37775).

40021153 is a wasteful number, since it uses less digits than its factorization.

40021153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37774.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 40021153 is about 6326.2273907915. The cubic root of 40021153 is about 342.0554639137.

Adding to 40021153 its reverse (35112004), we get a palindrome (75133157).

The spelling of 40021153 in words is "forty million, twenty-one thousand, one hundred fifty-three".