40450422521 has 4 divisors (see below), whose sum is σ = 41004537972. Its totient is φ = 39896307072.

The previous prime is 40450422497. The next prime is 40450422559. The reversal of 40450422521 is 12522405404.

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 26440386025 + 14010036496 = 162605^2 + 118364^2 .

It is a cyclic number.

It is not a de Polignac number, because 40450422521 - 2¹⁰ = 40450421497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40450422721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277057616 + ... + 277057761.

It is an arithmetic number, because the mean of its divisors is an integer number (10251134493).

Almost surely, 2^40450422521 is an apocalyptic number.

It is an amenable number.

40450422521 is a deficient number, since it is larger than the sum of its proper divisors (554115451).

40450422521 is an equidigital number, since it uses as much as digits as its factorization.

40450422521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554115450.

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 40450422521 its reverse (12522405404), we get a palindrome (52972827925).

The spelling of 40450422521 in words is "forty billion, four hundred fifty million, four hundred twenty-two thousand, five hundred twenty-one".