213260163601 has 3 divisors (see below), whose sum is σ = 213260625403. Its totient is φ = 213259701800.

The previous prime is 213260163593. The next prime is 213260163607. The reversal of 213260163601 is 106361062312.

The square root of 213260163601 is 461801.

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

213260163601 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., 74805201 + 213185358400 = 8649^2 + 461720^2 .

It is not a de Polignac number, because 213260163601 - 2³ = 213260163593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213260163607) 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, 230901 + ... + 692701.

Almost surely, 2^213260163601 is an apocalyptic number.

213260163601 is the 461801-st square number.

213260163601 is the 230901-st centered octagonal number.

It is an amenable number.

213260163601 is a deficient number, since it is larger than the sum of its proper divisors (461802).

213260163601 is an frugal number, since it uses more digits than its factorization.

213260163601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923602 (or 461801 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 213260163601 in words is "two hundred thirteen billion, two hundred sixty million, one hundred sixty-three thousand, six hundred one".