213581698201 has 3 divisors (see below), whose sum is σ = 213582160351. Its totient is φ = 213581236052.

The previous prime is 213581698199. The next prime is 213581698207. The reversal of 213581698201 is 102896185312.

The square root of 213581698201 is 462149.

It is a perfect power (a square), and thus also a powerful number.

213581698201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 156737601801 + 56844096400 = 395901^2 + 238420^2 .

It is not a de Polignac number, because 213581698201 - 2¹ = 213581698199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213581698207) 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 2 ways as a sum of consecutive naturals, for example, 231075 + ... + 693223.

Almost surely, 2^213581698201 is an apocalyptic number.

213581698201 is the 462149-th square number.

213581698201 is the 231075-th centered octagonal number.

It is an amenable number.

213581698201 is a deficient number, since it is larger than the sum of its proper divisors (462150).

213581698201 is an frugal number, since it uses more digits than its factorization.

213581698201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924298 (or 462149 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 213581698201 in words is "two hundred thirteen billion, five hundred eighty-one million, six hundred ninety-eight thousand, two hundred one".