40231423217 has 2 divisors, whose sum is σ = 40231423218. Its totient is φ = 40231423216.

The previous prime is 40231423181. The next prime is 40231423411. The reversal of 40231423217 is 71232413204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20392982416 + 19838440801 = 142804^2 + 140849^2 .

It is a cyclic number.

It is not a de Polignac number, because 40231423217 - 2¹⁰ = 40231422193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40231423217.

It is not a weakly prime, because it can be changed into another prime (40231423417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20115711608 + 20115711609.

It is an arithmetic number, because the mean of its divisors is an integer number (20115711609).

Almost surely, 2^40231423217 is an apocalyptic number.

It is an amenable number.

40231423217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40231423217 is an equidigital number, since it uses as much as digits as its factorization.

40231423217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The spelling of 40231423217 in words is "forty billion, two hundred thirty-one million, four hundred twenty-three thousand, two hundred seventeen".