213012013 has 4 divisors (see below), whose sum is σ = 213262588. Its totient is φ = 212761440.

The previous prime is 213012011. The next prime is 213012043. The reversal of 213012013 is 310210312.

213012013 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 72897444 + 140114569 = 8538^2 + 11837^2 .

It is a cyclic number.

It is not a de Polignac number, because 213012013 - 2¹ = 213012011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213011984 and 213012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213012011) 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, 124008 + ... + 125713.

It is an arithmetic number, because the mean of its divisors is an integer number (53315647).

Almost surely, 2^213012013 is an apocalyptic number.

It is an amenable number.

213012013 is a deficient number, since it is larger than the sum of its proper divisors (250575).

213012013 is an equidigital number, since it uses as much as digits as its factorization.

213012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250574.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 213012013 is about 14594.9310721223. The cubic root of 213012013 is about 597.2204891188.

Adding to 213012013 its reverse (310210312), we get a palindrome (523222325).

The spelling of 213012013 in words is "two hundred thirteen million, twelve thousand, thirteen".