42171206293 has 2 divisors, whose sum is σ = 42171206294. Its totient is φ = 42171206292.

The previous prime is 42171206257. The next prime is 42171206299. The reversal of 42171206293 is 39260217124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25072505649 + 17098700644 = 158343^2 + 130762^2 .

It is a cyclic number.

It is not a de Polignac number, because 42171206293 - 2⁹ = 42171205781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42171206299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085603146 + 21085603147.

It is an arithmetic number, because the mean of its divisors is an integer number (21085603147).

Almost surely, 2^42171206293 is an apocalyptic number.

It is an amenable number.

42171206293 is a deficient number, since it is larger than the sum of its proper divisors (1).

42171206293 is an equidigital number, since it uses as much as digits as its factorization.

42171206293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 42171206293 in words is "forty-two billion, one hundred seventy-one million, two hundred six thousand, two hundred ninety-three".