42171206279 has 4 divisors (see below), whose sum is σ = 42172142640. Its totient is φ = 42170269920.

The previous prime is 42171206257. The next prime is 42171206293. The reversal of 42171206279 is 97260217124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42171206279 - 2²⁰ = 42170157703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42171206239) 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 in 3 ways as a sum of consecutive naturals, for example, 397019 + ... + 491900.

It is an arithmetic number, because the mean of its divisors is an integer number (10543035660).

Almost surely, 2^42171206279 is an apocalyptic number.

42171206279 is a deficient number, since it is larger than the sum of its proper divisors (936361).

42171206279 is an equidigital number, since it uses as much as digits as its factorization.

42171206279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936360.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 42171206279 in words is "forty-two billion, one hundred seventy-one million, two hundred six thousand, two hundred seventy-nine".