213406013 has 4 divisors (see below), whose sum is σ = 213436860. Its totient is φ = 213375168.

The previous prime is 213406007. The next prime is 213406021. The reversal of 213406013 is 310604312.

213406013 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 2 ways, for example, as 156825529 + 56580484 = 12523^2 + 7522^2 .

It is a cyclic number.

It is not a de Polignac number, because 213406013 - 2⁶ = 213405949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213406313) 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, 293 + ... + 20661.

It is an arithmetic number, because the mean of its divisors is an integer number (53359215).

Almost surely, 2^213406013 is an apocalyptic number.

It is an amenable number.

213406013 is a deficient number, since it is larger than the sum of its proper divisors (30847).

213406013 is a wasteful number, since it uses less digits than its factorization.

213406013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30846.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 213406013 is about 14608.4226732389. The cubic root of 213406013 is about 597.5884807956.

The spelling of 213406013 in words is "two hundred thirteen million, four hundred six thousand, thirteen".