40315817 has 2 divisors, whose sum is σ = 40315818. Its totient is φ = 40315816.

The previous prime is 40315787. The next prime is 40315883. The reversal of 40315817 is 71851304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40081561 + 234256 = 6331^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 40315817 - 2¹² = 40311721 is a prime.

It is a Chen prime.

It is equal to p_2451719 and since 40315817 and 2451719 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40315817.

It is not a weakly prime, because it can be changed into another prime (40315117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20157908 + 20157909.

It is an arithmetic number, because the mean of its divisors is an integer number (20157909).

Almost surely, 2^40315817 is an apocalyptic number.

It is an amenable number.

40315817 is a deficient number, since it is larger than the sum of its proper divisors (1).

40315817 is an equidigital number, since it uses as much as digits as its factorization.

40315817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 40315817 is about 6349.4737577220. The cubic root of 40315817 is about 342.8928966600.

The spelling of 40315817 in words is "forty million, three hundred fifteen thousand, eight hundred seventeen".