213004013 has 4 divisors (see below), whose sum is σ = 213180828. Its totient is φ = 212827200.

The previous prime is 213003997. The next prime is 213004031. The reversal of 213004013 is 310400312.

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 36990724 + 176013289 = 6082^2 + 13267^2 .

It is a cyclic number.

It is not a de Polignac number, because 213004013 - 2⁴ = 213003997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213004063) 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, 86588 + ... + 89013.

It is an arithmetic number, because the mean of its divisors is an integer number (53295207).

Almost surely, 2^213004013 is an apocalyptic number.

It is an amenable number.

213004013 is a deficient number, since it is larger than the sum of its proper divisors (176815).

213004013 is a wasteful number, since it uses less digits than its factorization.

213004013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176814.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 213004013 is about 14594.6570017935. The cubic root of 213004013 is about 597.2130125080.

Adding to 213004013 its reverse (310400312), we get a palindrome (523404325).

The spelling of 213004013 in words is "two hundred thirteen million, four thousand, thirteen".