213499725185 has 8 divisors (see below), whose sum is σ = 256378464360. Its totient is φ = 170680584064.

The previous prime is 213499725167. The next prime is 213499725203. The reversal of 213499725185 is 581527994312.

It is an interprime number because it is at equal distance from previous prime (213499725167) and next prime (213499725203).

It can be written as a sum of positive squares in 4 ways, for example, as 20435274304 + 193064450881 = 142952^2 + 439391^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 213499725185 - 2¹² = 213499721089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213499725185.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14891630 + ... + 14905959.

It is an arithmetic number, because the mean of its divisors is an integer number (32047308045).

Almost surely, 2^213499725185 is an apocalyptic number.

It is an amenable number.

213499725185 is a deficient number, since it is larger than the sum of its proper divisors (42878739175).

213499725185 is a wasteful number, since it uses less digits than its factorization.

213499725185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29799027.

The product of its digits is 5443200, while the sum is 56.

The spelling of 213499725185 in words is "two hundred thirteen billion, four hundred ninety-nine million, seven hundred twenty-five thousand, one hundred eighty-five".