231140352144 has 80 divisors (see below), whose sum is σ = 671002803072. Its totient is φ = 68027925504.

The previous prime is 231140352143. The next prime is 231140352181. The reversal of 231140352144 is 441253041132.

It is not an unprimeable number, because it can be changed into a prime (231140352143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8038197 + ... + 8066900.

Almost surely, 2^231140352144 is an apocalyptic number.

231140352144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231140352144 is an abundant number, since it is smaller than the sum of its proper divisors (439862450928).

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

231140352144 is a wasteful number, since it uses less digits than its factorization.

231140352144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16105144 (or 16105138 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 231140352144 its reverse (441253041132), we get a palindrome (672393393276).

The spelling of 231140352144 in words is "two hundred thirty-one billion, one hundred forty million, three hundred fifty-two thousand, one hundred forty-four".