40000224821 has 2 divisors, whose sum is σ = 40000224822. Its totient is φ = 40000224820.

The previous prime is 40000224769. The next prime is 40000224857. The reversal of 40000224821 is 12842200004.

It is a happy number.

40000224821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39978003025 + 22221796 = 199945^2 + 4714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40000224821 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40000224721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000112410 + 20000112411.

It is an arithmetic number, because the mean of its divisors is an integer number (20000112411).

Almost surely, 2^40000224821 is an apocalyptic number.

It is an amenable number.

40000224821 is a deficient number, since it is larger than the sum of its proper divisors (1).

40000224821 is an equidigital number, since it uses as much as digits as its factorization.

40000224821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 40000224821 its reverse (12842200004), we get a palindrome (52842424825).

The spelling of 40000224821 in words is "forty billion, two hundred twenty-four thousand, eight hundred twenty-one".