231428145344 has 42 divisors (see below), whose sum is σ = 501016970532. Its totient is φ = 105188809600.

The previous prime is 231428145331. The next prime is 231428145359. The reversal of 231428145344 is 443541824132.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12755159 + ... + 12773289.

Almost surely, 2^231428145344 is an apocalyptic number.

It is an amenable number.

231428145344 is an abundant number, since it is smaller than the sum of its proper divisors (269588825188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231428145344 is an frugal number, since it uses more digits than its factorization.

231428145344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36285 (or 18144 counting only the distinct ones).

The product of its digits is 368640, while the sum is 41.

Adding to 231428145344 its reverse (443541824132), we get a palindrome (674969969476).

The spelling of 231428145344 in words is "two hundred thirty-one billion, four hundred twenty-eight million, one hundred forty-five thousand, three hundred forty-four".