171171253 has 12 divisors (see below), whose sum is σ = 193403808. Its totient is φ = 150236240.

The previous prime is 171171241. The next prime is 171171257. The reversal of 171171253 is 352171171.

171171253 is a nontrivial binomial coefficient, being equal to C(18503, 2).

It is not a de Polignac number, because 171171253 - 2¹³ = 171163061 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 (171171257) 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 11 ways as a sum of consecutive naturals, for example, 1 + ... + 18502.

It is an arithmetic number, because the mean of its divisors is an integer number (16116984).

Almost surely, 2^171171253 is an apocalyptic number.

171171253 is the 18502-nd triangular number.

171171253 is the 6168-th centered nonagonal number.

It is an amenable number.

171171253 is a deficient number, since it is larger than the sum of its proper divisors (22232555).

171171253 is a wasteful number, since it uses less digits than its factorization.

171171253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18572 (or 18543 counting only the distinct ones).

The product of its digits is 1470, while the sum is 28.

The square root of 171171253 is about 13083.2432141270. The cubic root of 171171253 is about 555.2351388455.

The spelling of 171171253 in words is "one hundred seventy-one million, one hundred seventy-one thousand, two hundred fifty-three".