171428651 has 4 divisors (see below), whose sum is σ = 171479352. Its totient is φ = 171377952.

The previous prime is 171428627. The next prime is 171428671. The reversal of 171428651 is 156824171.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171428651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171428611) 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, 19886 + ... + 27171.

It is an arithmetic number, because the mean of its divisors is an integer number (42869838).

Almost surely, 2^171428651 is an apocalyptic number.

171428651 is a deficient number, since it is larger than the sum of its proper divisors (50701).

171428651 is an equidigital number, since it uses as much as digits as its factorization.

171428651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50700.

The product of its digits is 13440, while the sum is 35.

The square root of 171428651 is about 13093.0764528433. The cubic root of 171428651 is about 555.5133102381.

The spelling of 171428651 in words is "one hundred seventy-one million, four hundred twenty-eight thousand, six hundred fifty-one".