171942274213 has 16 divisors (see below), whose sum is σ = 174122348400. Its totient is φ = 169774133760.

The previous prime is 171942274211. The next prime is 171942274223. The reversal of 171942274213 is 312472249171.

It can be written as a sum of positive squares in 8 ways, for example, as 23484643009 + 148457631204 = 153247^2 + 385302^2 .

It is a cyclic number.

It is not a de Polignac number, because 171942274213 - 2¹ = 171942274211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171942274213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171942274211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63004233 + ... + 63006961.

It is an arithmetic number, because the mean of its divisors is an integer number (10882646775).

Almost surely, 2^171942274213 is an apocalyptic number.

It is an amenable number.

171942274213 is a deficient number, since it is larger than the sum of its proper divisors (2180074187).

171942274213 is a wasteful number, since it uses less digits than its factorization.

171942274213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632.

The product of its digits is 169344, while the sum is 43.

The spelling of 171942274213 in words is "one hundred seventy-one billion, nine hundred forty-two million, two hundred seventy-four thousand, two hundred thirteen".