171156487 has 16 divisors (see below), whose sum is σ = 183251200. Its totient is φ = 159680160.

The previous prime is 171156473. The next prime is 171156497. The reversal of 171156487 is 784651171.

It is not a de Polignac number, because 171156487 - 2²³ = 162767879 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 (171156497) 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, 1570189 + ... + 1570297.

It is an arithmetic number, because the mean of its divisors is an integer number (11453200).

Almost surely, 2^171156487 is an apocalyptic number.

171156487 is a deficient number, since it is larger than the sum of its proper divisors (12094713).

171156487 is an frugal number, since it uses more digits than its factorization.

171156487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 177 counting only the distinct ones).

The product of its digits is 47040, while the sum is 40.

The square root of 171156487 is about 13082.6788923370. The cubic root of 171156487 is about 555.2191726953.

The spelling of 171156487 in words is "one hundred seventy-one million, one hundred fifty-six thousand, four hundred eighty-seven".