171020151 has 6 divisors (see below), whose sum is σ = 247029120. Its totient is φ = 114013428.

The previous prime is 171020147. The next prime is 171020167. The reversal of 171020151 is 151020171.

It is a happy number.

It is not a de Polignac number, because 171020151 - 2² = 171020147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171020131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9501111 + ... + 9501128.

It is an arithmetic number, because the mean of its divisors is an integer number (41171520).

Almost surely, 2^171020151 is an apocalyptic number.

171020151 is a deficient number, since it is larger than the sum of its proper divisors (76008969).

171020151 is a wasteful number, since it uses less digits than its factorization.

171020151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19002245 (or 19002242 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 171020151 is about 13077.4673006664. The cubic root of 171020151 is about 555.0717121848.

It can be divided in two parts, 171020 and 151, that added together give a palindrome (171171).

The spelling of 171020151 in words is "one hundred seventy-one million, twenty thousand, one hundred fifty-one".