40315394281 has 2 divisors, whose sum is σ = 40315394282. Its totient is φ = 40315394280.

The previous prime is 40315394269. The next prime is 40315394297. The reversal of 40315394281 is 18249351304.

It is a happy number.

40315394281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39368909056 + 946485225 = 198416^2 + 30765^2 .

It is a cyclic number.

It is not a de Polignac number, because 40315394281 - 2¹¹ = 40315392233 is a prime.

It is a super-2 number, since 2×40315394281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40315394081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20157697140 + 20157697141.

It is an arithmetic number, because the mean of its divisors is an integer number (20157697141).

Almost surely, 2^40315394281 is an apocalyptic number.

It is an amenable number.

40315394281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40315394281 is an equidigital number, since it uses as much as digits as its factorization.

40315394281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 40315394281 in words is "forty billion, three hundred fifteen million, three hundred ninety-four thousand, two hundred eighty-one".