20170151 has 4 divisors (see below), whose sum is σ = 20315400. Its totient is φ = 20024904.

The previous prime is 20170141. The next prime is 20170169. The reversal of 20170151 is 15107102.

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-20170151 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 (20170121) 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, 72416 + ... + 72693.

It is an arithmetic number, because the mean of its divisors is an integer number (5078850).

Almost surely, 2^20170151 is an apocalyptic number.

20170151 is a deficient number, since it is larger than the sum of its proper divisors (145249).

20170151 is a wasteful number, since it uses less digits than its factorization.

20170151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145248.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 20170151 is about 4491.1191255632. The cubic root of 20170151 is about 272.2093570917.

Adding to 20170151 its reverse (15107102), we get a palindrome (35277253).

The spelling of 20170151 in words is "twenty million, one hundred seventy thousand, one hundred fifty-one".