40238400217 has 2 divisors, whose sum is σ = 40238400218. Its totient is φ = 40238400216.

The previous prime is 40238400211. The next prime is 40238400229. The reversal of 40238400217 is 71200483204.

40238400217 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., 39897665536 + 340734681 = 199744^2 + 18459^2 .

It is a cyclic number.

It is not a de Polignac number, because 40238400217 - 2¹⁹ = 40237875929 is a prime.

It is not a weakly prime, because it can be changed into another prime (40238400211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20119200108 + 20119200109.

It is an arithmetic number, because the mean of its divisors is an integer number (20119200109).

Almost surely, 2^40238400217 is an apocalyptic number.

It is an amenable number.

40238400217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40238400217 is an equidigital number, since it uses as much as digits as its factorization.

40238400217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The spelling of 40238400217 in words is "forty billion, two hundred thirty-eight million, four hundred thousand, two hundred seventeen".