213244013 has 2 divisors, whose sum is σ = 213244014. Its totient is φ = 213244012.

The previous prime is 213244007. The next prime is 213244033. The reversal of 213244013 is 310442312.

It is an a-pointer prime, because the next prime (213244033) can be obtained adding 213244013 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210192004 + 3052009 = 14498^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 213244013 - 2⁶ = 213243949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213244033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106622006 + 106622007.

It is an arithmetic number, because the mean of its divisors is an integer number (106622007).

Almost surely, 2^213244013 is an apocalyptic number.

It is an amenable number.

213244013 is a deficient number, since it is larger than the sum of its proper divisors (1).

213244013 is an equidigital number, since it uses as much as digits as its factorization.

213244013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 213244013 is about 14602.8768740957. The cubic root of 213244013 is about 597.4372294486.

Adding to 213244013 its reverse (310442312), we get a palindrome (523686325).

The spelling of 213244013 in words is "two hundred thirteen million, two hundred forty-four thousand, thirteen".