213135001 has 4 divisors (see below), whose sum is σ = 225672372. Its totient is φ = 200597632.

The previous prime is 213134993. The next prime is 213135011. The reversal of 213135001 is 100531312.

213135001 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.

It can be written as a sum of positive squares in 2 ways, for example, as 84198976 + 128936025 = 9176^2 + 11355^2 .

It is a cyclic number.

It is not a de Polignac number, because 213135001 - 2³ = 213134993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213135011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6268660 + ... + 6268693.

It is an arithmetic number, because the mean of its divisors is an integer number (56418093).

Almost surely, 2^213135001 is an apocalyptic number.

It is an amenable number.

213135001 is a deficient number, since it is larger than the sum of its proper divisors (12537371).

213135001 is a wasteful number, since it uses less digits than its factorization.

213135001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12537370.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 213135001 is about 14599.1438447602. The cubic root of 213135001 is about 597.3354072412.

Adding to 213135001 its reverse (100531312), we get a palindrome (313666313).

The spelling of 213135001 in words is "two hundred thirteen million, one hundred thirty-five thousand, one".