20143151 has 4 divisors (see below), whose sum is σ = 23020752. Its totient is φ = 17265552.

The previous prime is 20143129. The next prime is 20143153. The reversal of 20143151 is 15134102.

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-20143151 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 (20143153) 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, 1438790 + ... + 1438803.

It is an arithmetic number, because the mean of its divisors is an integer number (5755188).

Almost surely, 2^20143151 is an apocalyptic number.

20143151 is a deficient number, since it is larger than the sum of its proper divisors (2877601).

20143151 is an equidigital number, since it uses as much as digits as its factorization.

20143151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877600.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20143151 is about 4488.1121866549. The cubic root of 20143151 is about 272.0878419789.

Adding to 20143151 its reverse (15134102), we get a palindrome (35277253).

The spelling of 20143151 in words is "twenty million, one hundred forty-three thousand, one hundred fifty-one".