231111203430 has 64 divisors (see below), whose sum is σ = 562992534720. Its totient is φ = 60711123456.

The previous prime is 231111203429. The next prime is 231111203443. The reversal of 231111203430 is 34302111132.

It is a junction number, because it is equal to n+sod(n) for n = 231111203397 and 231111203406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361444 + ... + 769976.

It is an arithmetic number, because the mean of its divisors is an integer number (8796758355).

Almost surely, 2^231111203430 is an apocalyptic number.

231111203430 is an abundant number, since it is smaller than the sum of its proper divisors (331881331290).

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

231111203430 is a wasteful number, since it uses less digits than its factorization.

231111203430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408825.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231111203430 its reverse (34302111132), we get a palindrome (265413314562).

The spelling of 231111203430 in words is "two hundred thirty-one billion, one hundred eleven million, two hundred three thousand, four hundred thirty".