231131312030 has 16 divisors (see below), whose sum is σ = 424888200000. Its totient is φ = 90485449632.

The previous prime is 231131312023. The next prime is 231131312039. The reversal of 231131312030 is 30213131132.

It is a junction number, because it is equal to n+sod(n) for n = 231131311993 and 231131312011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231131312039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245883905 + ... + 245884844.

It is an arithmetic number, because the mean of its divisors is an integer number (26555512500).

Almost surely, 2^231131312030 is an apocalyptic number.

231131312030 is a deficient number, since it is larger than the sum of its proper divisors (193756887970).

231131312030 is a wasteful number, since it uses less digits than its factorization.

231131312030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491768803.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 231131312030 its reverse (30213131132), we get a palindrome (261344443162).

The spelling of 231131312030 in words is "two hundred thirty-one billion, one hundred thirty-one million, three hundred twelve thousand, thirty".