238523318513 has 2 divisors, whose sum is σ = 238523318514. Its totient is φ = 238523318512.

The previous prime is 238523318479. The next prime is 238523318611. The reversal of 238523318513 is 315813325832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169026232384 + 69497086129 = 411128^2 + 263623^2 .

It is a cyclic number.

It is not a de Polignac number, because 238523318513 - 2²² = 238519124209 is a prime.

It is not a weakly prime, because it can be changed into another prime (238523318113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119261659256 + 119261659257.

It is an arithmetic number, because the mean of its divisors is an integer number (119261659257).

Almost surely, 2^238523318513 is an apocalyptic number.

It is an amenable number.

238523318513 is a deficient number, since it is larger than the sum of its proper divisors (1).

238523318513 is an equidigital number, since it uses as much as digits as its factorization.

238523318513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The spelling of 238523318513 in words is "two hundred thirty-eight billion, five hundred twenty-three million, three hundred eighteen thousand, five hundred thirteen".