40131304217 has 2 divisors, whose sum is σ = 40131304218. Its totient is φ = 40131304216.

The previous prime is 40131304193. The next prime is 40131304249. The reversal of 40131304217 is 71240313104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37877333641 + 2253970576 = 194621^2 + 47476^2 .

It is a cyclic number.

It is not a de Polignac number, because 40131304217 - 2¹⁶ = 40131238681 is a prime.

It is a super-2 number, since 2×40131304217² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40131300217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20065652108 + 20065652109.

It is an arithmetic number, because the mean of its divisors is an integer number (20065652109).

Almost surely, 2^40131304217 is an apocalyptic number.

It is an amenable number.

40131304217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40131304217 is an equidigital number, since it uses as much as digits as its factorization.

40131304217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The spelling of 40131304217 in words is "forty billion, one hundred thirty-one million, three hundred four thousand, two hundred seventeen".