17121831272 has 48 divisors (see below), whose sum is σ = 40217500260. Its totient is φ = 6773469696.

The previous prime is 17121831271. The next prime is 17121831341. The reversal of 17121831272 is 27213812171.

It can be written as a sum of positive squares in 2 ways, for example, as 17057927236 + 63904036 = 130606^2 + 7994^2 .

It is a super-2 number, since 2×17121831272² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (17121831271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1674833 + ... + 1685024.

Almost surely, 2^17121831272 is an apocalyptic number.

It is an amenable number.

17121831272 is an abundant number, since it is smaller than the sum of its proper divisors (23095668988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17121831272 is a wasteful number, since it uses less digits than its factorization.

17121831272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359890 (or 3359879 counting only the distinct ones).

The product of its digits is 9408, while the sum is 35.

The spelling of 17121831272 in words is "seventeen billion, one hundred twenty-one million, eight hundred thirty-one thousand, two hundred seventy-two".