40224442021 has 4 divisors (see below), whose sum is σ = 40322790700. Its totient is φ = 40126093344.

The previous prime is 40224442019. The next prime is 40224442031. The reversal of 40224442021 is 12024442204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30015562500 + 10208879521 = 173250^2 + 101039^2 .

It is a cyclic number.

It is not a de Polignac number, because 40224442021 - 2¹ = 40224442019 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 (40224442001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49173726 + ... + 49174543.

It is an arithmetic number, because the mean of its divisors is an integer number (10080697675).

Almost surely, 2^40224442021 is an apocalyptic number.

It is an amenable number.

40224442021 is a deficient number, since it is larger than the sum of its proper divisors (98348679).

40224442021 is an equidigital number, since it uses as much as digits as its factorization.

40224442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98348678.

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 40224442021 its reverse (12024442204), we get a palindrome (52248884225).

The spelling of 40224442021 in words is "forty billion, two hundred twenty-four million, four hundred forty-two thousand, twenty-one".