2157867315171 has 32 divisors (see below), whose sum is σ = 3241163609600. Its totient is φ = 1418769885600.

The previous prime is 2157867315161. The next prime is 2157867315269. The reversal of 2157867315171 is 1715137687512.

2157867315171 is a `hidden beast` number, since 2 + 1 + 57 + 8 + 6 + 73 + 1 + 517 + 1 = 666.

It is not a de Polignac number, because 2157867315171 - 2³⁴ = 2140687445987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2157867315161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1337176 + ... + 2470581.

It is an arithmetic number, because the mean of its divisors is an integer number (101286362800).

Almost surely, 2^{2157867315171} is an apocalyptic number.

2157867315171 is a deficient number, since it is larger than the sum of its proper divisors (1083296294429).

2157867315171 is a wasteful number, since it uses less digits than its factorization.

2157867315171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3808056 (or 3808050 counting only the distinct ones).

The product of its digits is 2469600, while the sum is 54.

The spelling of 2157867315171 in words is "two trillion, one hundred fifty-seven billion, eight hundred sixty-seven million, three hundred fifteen thousand, one hundred seventy-one".