520002143 has 4 divisors (see below), whose sum is σ = 520089480. Its totient is φ = 519914808.

The previous prime is 520002097. The next prime is 520002149. The reversal of 520002143 is 341200025.

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-520002143 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 (520002149) 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, 34028 + ... + 46881.

It is an arithmetic number, because the mean of its divisors is an integer number (130022370).

Almost surely, 2^520002143 is an apocalyptic number.

520002143 is a deficient number, since it is larger than the sum of its proper divisors (87337).

520002143 is an equidigital number, since it uses as much as digits as its factorization.

520002143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87336.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 520002143 is about 22803.5554903177. Note that the first 3 decimals coincide. The cubic root of 520002143 is about 804.1462563849.

Adding to 520002143 its reverse (341200025), we get a palindrome (861202168).

The spelling of 520002143 in words is "five hundred twenty million, two thousand, one hundred forty-three".