231551431354147 has 2 divisors, whose sum is σ = 231551431354148. Its totient is φ = 231551431354146.

The previous prime is 231551431354141. The next prime is 231551431354157. The reversal of 231551431354147 is 741453134155132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231551431354147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231551431354147.

It is not a weakly prime, because it can be changed into another prime (231551431354141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115775715677073 + 115775715677074.

It is an arithmetic number, because the mean of its divisors is an integer number (115775715677074).

Almost surely, 2^{231551431354147} is an apocalyptic number.

231551431354147 is a deficient number, since it is larger than the sum of its proper divisors (1).

231551431354147 is an equidigital number, since it uses as much as digits as its factorization.

231551431354147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024000, while the sum is 49.

The spelling of 231551431354147 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred fifty-four thousand, one hundred forty-seven".