2171351286875 has 10 divisors (see below), whose sum is σ = 2713320568860. Its totient is φ = 1737081029000.

The previous prime is 2171351286859. The next prime is 2171351286877. The reversal of 2171351286875 is 5786821531712.

It is not a de Polignac number, because 2171351286875 - 2⁴ = 2171351286859 is a prime.

It is a super-2 number, since 2×2171351286875² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2171351286875.

It is not an unprimeable number, because it can be changed into a prime (2171351286877) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1737080405 + ... + 1737081654.

It is an arithmetic number, because the mean of its divisors is an integer number (271332056886).

Almost surely, 2^{2171351286875} is an apocalyptic number.

2171351286875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2171351286875 is a deficient number, since it is larger than the sum of its proper divisors (541969281985).

2171351286875 is an frugal number, since it uses more digits than its factorization.

2171351286875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474162079 (or 3474162064 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 56.

The spelling of 2171351286875 in words is "two trillion, one hundred seventy-one billion, three hundred fifty-one million, two hundred eighty-six thousand, eight hundred seventy-five".