213005424185 has 8 divisors (see below), whose sum is σ = 255608994696. Its totient is φ = 170402682240.

The previous prime is 213005424167. The next prime is 213005424199. The reversal of 213005424185 is 581424500312.

It can be written as a sum of positive squares in 4 ways, for example, as 36501248809 + 176504175376 = 191053^2 + 420124^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213005424185 - 2¹⁰ = 213005423161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835997 + ... + 1060613.

It is an arithmetic number, because the mean of its divisors is an integer number (31951124337).

Almost surely, 2^213005424185 is an apocalyptic number.

It is an amenable number.

213005424185 is a deficient number, since it is larger than the sum of its proper divisors (42603570511).

213005424185 is a wasteful number, since it uses less digits than its factorization.

213005424185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414283.

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 213005424185 its reverse (581424500312), we get a palindrome (794429924497).

The spelling of 213005424185 in words is "two hundred thirteen billion, five million, four hundred twenty-four thousand, one hundred eighty-five".