231747154206157 has 2 divisors, whose sum is σ = 231747154206158. Its totient is φ = 231747154206156.

The previous prime is 231747154206143. The next prime is 231747154206229. The reversal of 231747154206157 is 751602451747132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161271229946121 + 70475924260036 = 12699261^2 + 8394994^2 .

It is a cyclic number.

It is not a de Polignac number, because 231747154206157 - 2¹¹ = 231747154204109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231747154206098 and 231747154206107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231747154200157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115873577103078 + 115873577103079.

It is an arithmetic number, because the mean of its divisors is an integer number (115873577103079).

Almost surely, 2^{231747154206157} is an apocalyptic number.

It is an amenable number.

231747154206157 is a deficient number, since it is larger than the sum of its proper divisors (1).

231747154206157 is an equidigital number, since it uses as much as digits as its factorization.

231747154206157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9878400, while the sum is 55.

The spelling of 231747154206157 in words is "two hundred thirty-one trillion, seven hundred forty-seven billion, one hundred fifty-four million, two hundred six thousand, one hundred fifty-seven".