231331130340 has 24 divisors (see below), whose sum is σ = 647727165120. Its totient is φ = 61688301408.

The previous prime is 231331130291. The next prime is 231331130357. The reversal of 231331130340 is 43031133132.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 231331130340.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1927759360 + ... + 1927759479.

It is an arithmetic number, because the mean of its divisors is an integer number (26988631880).

Almost surely, 2^231331130340 is an apocalyptic number.

231331130340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231331130340 is an abundant number, since it is smaller than the sum of its proper divisors (416396034780).

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

231331130340 is a wasteful number, since it uses less digits than its factorization.

231331130340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855518851 (or 3855518849 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 231331130340 its reverse (43031133132), we get a palindrome (274362263472).

The spelling of 231331130340 in words is "two hundred thirty-one billion, three hundred thirty-one million, one hundred thirty thousand, three hundred forty".