663115213 has 2 divisors, whose sum is σ = 663115214. Its totient is φ = 663115212.

The previous prime is 663115157. The next prime is 663115241. The reversal of 663115213 is 312511366.

It is an a-pointer prime, because the next prime (663115241) can be obtained adding 663115213 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484572169 + 178543044 = 22013^2 + 13362^2 .

It is a cyclic number.

It is not a de Polignac number, because 663115213 - 2¹³ = 663107021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663110213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331557606 + 331557607.

It is an arithmetic number, because the mean of its divisors is an integer number (331557607).

Almost surely, 2^663115213 is an apocalyptic number.

It is an amenable number.

663115213 is a deficient number, since it is larger than the sum of its proper divisors (1).

663115213 is an equidigital number, since it uses as much as digits as its factorization.

663115213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 663115213 is about 25751.0235330559. The cubic root of 663115213 is about 872.0264617036.

Adding to 663115213 its reverse (312511366), we get a palindrome (975626579).

The spelling of 663115213 in words is "six hundred sixty-three million, one hundred fifteen thousand, two hundred thirteen".