210043013 has 2 divisors, whose sum is σ = 210043014. Its totient is φ = 210043012.

The previous prime is 210042979. The next prime is 210043019. The reversal of 210043013 is 310340012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205578244 + 4464769 = 14338^2 + 2113^2 .

It is a cyclic number.

It is not a de Polignac number, because 210043013 - 2⁸ = 210042757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210043019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105021506 + 105021507.

It is an arithmetic number, because the mean of its divisors is an integer number (105021507).

Almost surely, 2^210043013 is an apocalyptic number.

It is an amenable number.

210043013 is a deficient number, since it is larger than the sum of its proper divisors (1).

210043013 is an equidigital number, since it uses as much as digits as its factorization.

210043013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 210043013 is about 14492.8607596982. The cubic root of 210043013 is about 594.4327743972.

Adding to 210043013 its reverse (310340012), we get a palindrome (520383025).

The spelling of 210043013 in words is "two hundred ten million, forty-three thousand, thirteen".