40217453281 has 2 divisors, whose sum is σ = 40217453282. Its totient is φ = 40217453280.

The previous prime is 40217453239. The next prime is 40217453303. The reversal of 40217453281 is 18235471204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26996133025 + 13221320256 = 164305^2 + 114984^2 .

It is a cyclic number.

It is not a de Polignac number, because 40217453281 - 2¹¹ = 40217451233 is a prime.

It is a super-2 number, since 2×40217453281² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40217453281.

It is not a weakly prime, because it can be changed into another prime (40217453201) 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, 20108726640 + 20108726641.

It is an arithmetic number, because the mean of its divisors is an integer number (20108726641).

Almost surely, 2^40217453281 is an apocalyptic number.

It is an amenable number.

40217453281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40217453281 is an equidigital number, since it uses as much as digits as its factorization.

40217453281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 40217453281 in words is "forty billion, two hundred seventeen million, four hundred fifty-three thousand, two hundred eighty-one".