231487216616137 has 2 divisors, whose sum is σ = 231487216616138. Its totient is φ = 231487216616136.

The previous prime is 231487216616113. The next prime is 231487216616167. The reversal of 231487216616137 is 731616612784132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219937679447616 + 11549537168521 = 14830296^2 + 3398461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231487216616137 is a prime.

It is not a weakly prime, because it can be changed into another prime (231487216616167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115743608308068 + 115743608308069.

It is an arithmetic number, because the mean of its divisors is an integer number (115743608308069).

Almost surely, 2^{231487216616137} is an apocalyptic number.

It is an amenable number.

231487216616137 is a deficient number, since it is larger than the sum of its proper divisors (1).

231487216616137 is an equidigital number, since it uses as much as digits as its factorization.

231487216616137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 58.

The spelling of 231487216616137 in words is "two hundred thirty-one trillion, four hundred eighty-seven billion, two hundred sixteen million, six hundred sixteen thousand, one hundred thirty-seven".