40021287323 has 2 divisors, whose sum is σ = 40021287324. Its totient is φ = 40021287322.

The previous prime is 40021287311. The next prime is 40021287329. The reversal of 40021287323 is 32378212004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40021287323 - 2²⁴ = 40004510107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40021287323.

It is not a weakly prime, because it can be changed into another prime (40021287329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010643661 + 20010643662.

It is an arithmetic number, because the mean of its divisors is an integer number (20010643662).

Almost surely, 2^40021287323 is an apocalyptic number.

40021287323 is a deficient number, since it is larger than the sum of its proper divisors (1).

40021287323 is an equidigital number, since it uses as much as digits as its factorization.

40021287323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

Adding to 40021287323 its reverse (32378212004), we get a palindrome (72399499327).

The spelling of 40021287323 in words is "forty billion, twenty-one million, two hundred eighty-seven thousand, three hundred twenty-three".