171081427 has 4 divisors (see below), whose sum is σ = 186634296. Its totient is φ = 155528560.

The previous prime is 171081419. The next prime is 171081431. The reversal of 171081427 is 724180171.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 171081427 - 2³ = 171081419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171081497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7776418 + ... + 7776439.

It is an arithmetic number, because the mean of its divisors is an integer number (46658574).

Almost surely, 2^171081427 is an apocalyptic number.

171081427 is a deficient number, since it is larger than the sum of its proper divisors (15552869).

171081427 is a wasteful number, since it uses less digits than its factorization.

171081427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15552868.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 171081427 is about 13079.8098992302. The cubic root of 171081427 is about 555.1379977709.

The spelling of 171081427 in words is "one hundred seventy-one million, eighty-one thousand, four hundred twenty-seven".