213430143 has 4 divisors (see below), whose sum is σ = 284573528. Its totient is φ = 142286760.

The previous prime is 213430141. The next prime is 213430153. The reversal of 213430143 is 341034312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 213430143 - 2¹ = 213430141 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 (213430141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35571688 + ... + 35571693.

It is an arithmetic number, because the mean of its divisors is an integer number (71143382).

Almost surely, 2^213430143 is an apocalyptic number.

213430143 is a deficient number, since it is larger than the sum of its proper divisors (71143385).

213430143 is an equidigital number, since it uses as much as digits as its factorization.

213430143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71143384.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 213430143 is about 14609.2485433030. The cubic root of 213430143 is about 597.6110032266.

Adding to 213430143 its reverse (341034312), we get a palindrome (554464455).

The spelling of 213430143 in words is "two hundred thirteen million, four hundred thirty thousand, one hundred forty-three".