263732218684213 has 2 divisors, whose sum is σ = 263732218684214. Its totient is φ = 263732218684212.

The previous prime is 263732218684159. The next prime is 263732218684229. The reversal of 263732218684213 is 312486812237362.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255197366110404 + 8534852573809 = 15974898^2 + 2921447^2 .

It is a cyclic number.

It is not a de Polignac number, because 263732218684213 - 2²¹ = 263732216587061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263732218684273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131866109342106 + 131866109342107.

It is an arithmetic number, because the mean of its divisors is an integer number (131866109342107).

Almost surely, 2^{263732218684213} is an apocalyptic number.

It is an amenable number.

263732218684213 is a deficient number, since it is larger than the sum of its proper divisors (1).

263732218684213 is an equidigital number, since it uses as much as digits as its factorization.

263732218684213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 58.

The spelling of 263732218684213 in words is "two hundred sixty-three trillion, seven hundred thirty-two billion, two hundred eighteen million, six hundred eighty-four thousand, two hundred thirteen".