40424400217 has 2 divisors, whose sum is σ = 40424400218. Its totient is φ = 40424400216.

The previous prime is 40424400193. The next prime is 40424400239. The reversal of 40424400217 is 71200442404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26133632281 + 14290767936 = 161659^2 + 119544^2 .

It is a cyclic number.

It is not a de Polignac number, because 40424400217 - 2⁷ = 40424400089 is a prime.

It is not a weakly prime, because it can be changed into another prime (40424400277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20212200108 + 20212200109.

It is an arithmetic number, because the mean of its divisors is an integer number (20212200109).

Almost surely, 2^40424400217 is an apocalyptic number.

It is an amenable number.

40424400217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40424400217 is an equidigital number, since it uses as much as digits as its factorization.

40424400217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 28.

The spelling of 40424400217 in words is "forty billion, four hundred twenty-four million, four hundred thousand, two hundred seventeen".