40555501321 has 2 divisors, whose sum is σ = 40555501322. Its totient is φ = 40555501320.

The previous prime is 40555501303. The next prime is 40555501331. The reversal of 40555501321 is 12310555504.

40555501321 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., 36686039296 + 3869462025 = 191536^2 + 62205^2 .

It is a cyclic number.

It is not a de Polignac number, because 40555501321 - 2⁵ = 40555501289 is a prime.

It is not a weakly prime, because it can be changed into another prime (40555501331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20277750660 + 20277750661.

It is an arithmetic number, because the mean of its divisors is an integer number (20277750661).

Almost surely, 2^40555501321 is an apocalyptic number.

It is an amenable number.

40555501321 is a deficient number, since it is larger than the sum of its proper divisors (1).

40555501321 is an equidigital number, since it uses as much as digits as its factorization.

40555501321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 40555501321 in words is "forty billion, five hundred fifty-five million, five hundred one thousand, three hundred twenty-one".