215443013 has 2 divisors, whose sum is σ = 215443014. Its totient is φ = 215443012.

The previous prime is 215443003. The next prime is 215443021. The reversal of 215443013 is 310344512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141086884 + 74356129 = 11878^2 + 8623^2 .

It is a cyclic number.

It is not a de Polignac number, because 215443013 - 2⁶ = 215442949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215443013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215443003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107721506 + 107721507.

It is an arithmetic number, because the mean of its divisors is an integer number (107721507).

Almost surely, 2^215443013 is an apocalyptic number.

It is an amenable number.

215443013 is a deficient number, since it is larger than the sum of its proper divisors (1).

215443013 is an equidigital number, since it uses as much as digits as its factorization.

215443013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 215443013 is about 14677.9771426447. The cubic root of 215443013 is about 599.4838273667.

Adding to 215443013 its reverse (310344512), we get a palindrome (525787525).

The spelling of 215443013 in words is "two hundred fifteen million, four hundred forty-three thousand, thirteen".