213231013 has 2 divisors, whose sum is σ = 213231014. Its totient is φ = 213231012.

The previous prime is 213230987. The next prime is 213231049. The reversal of 213231013 is 310132312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208311489 + 4919524 = 14433^2 + 2218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213231013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213231913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106615506 + 106615507.

It is an arithmetic number, because the mean of its divisors is an integer number (106615507).

Almost surely, 2^213231013 is an apocalyptic number.

It is an amenable number.

213231013 is a deficient number, since it is larger than the sum of its proper divisors (1).

213231013 is an equidigital number, since it uses as much as digits as its factorization.

213231013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 213231013 is about 14602.4317495409. The cubic root of 213231013 is about 597.4250886751.

Adding to 213231013 its reverse (310132312), we get a palindrome (523363325).

The spelling of 213231013 in words is "two hundred thirteen million, two hundred thirty-one thousand, thirteen".