231145345145 has 64 divisors (see below), whose sum is σ = 348329092608. Its totient is φ = 144807168000.

The previous prime is 231145345127. The next prime is 231145345157. The reversal of 231145345145 is 541543541132.

It is not a de Polignac number, because 231145345145 - 2²⁶ = 231078236281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231145345099 and 231145345108.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 502835 + ... + 845655.

It is an arithmetic number, because the mean of its divisors is an integer number (5442642072).

Almost surely, 2^231145345145 is an apocalyptic number.

It is an amenable number.

231145345145 is a deficient number, since it is larger than the sum of its proper divisors (117183747463).

231145345145 is a wasteful number, since it uses less digits than its factorization.

231145345145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342914.

The product of its digits is 144000, while the sum is 38.

Adding to 231145345145 its reverse (541543541132), we get a palindrome (772688886277).

The spelling of 231145345145 in words is "two hundred thirty-one billion, one hundred forty-five million, three hundred forty-five thousand, one hundred forty-five".