213538143 has 16 divisors (see below), whose sum is σ = 350422016. Its totient is φ = 112635360.

The previous prime is 213538133. The next prime is 213538159. The reversal of 213538143 is 341835312.

It is not a de Polignac number, because 213538143 - 2⁵ = 213538111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213538143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213538103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390823 + ... + 391368.

It is an arithmetic number, because the mean of its divisors is an integer number (21901376).

Almost surely, 2^213538143 is an apocalyptic number.

213538143 is a deficient number, since it is larger than the sum of its proper divisors (136883873).

213538143 is a wasteful number, since it uses less digits than its factorization.

213538143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782214.

The product of its digits is 8640, while the sum is 30.

The square root of 213538143 is about 14612.9443645009. The cubic root of 213538143 is about 597.7117873426.

The spelling of 213538143 in words is "two hundred thirteen million, five hundred thirty-eight thousand, one hundred forty-three".