231311131430 has 16 divisors (see below), whose sum is σ = 416928071664. Its totient is φ = 92398222560.

The previous prime is 231311131417. The next prime is 231311131483. The reversal of 231311131430 is 34131113132.

It is a junction number, because it is equal to n+sod(n) for n = 231311131396 and 231311131405.

It is a congruent number.

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, 15771056 + ... + 15785715.

It is an arithmetic number, because the mean of its divisors is an integer number (26058004479).

Almost surely, 2^231311131430 is an apocalyptic number.

231311131430 is a deficient number, since it is larger than the sum of its proper divisors (185616940234).

231311131430 is a wasteful number, since it uses less digits than its factorization.

231311131430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31557511.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 231311131430 its reverse (34131113132), we get a palindrome (265442244562).

The spelling of 231311131430 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred thirty-one thousand, four hundred thirty".