231320234430 has 32 divisors (see below), whose sum is σ = 616853959200. Its totient is φ = 61685395776.

The previous prime is 231320234377. The next prime is 231320234443. The reversal of 231320234430 is 34432023132.

231320234430 is a `hidden beast` number, since 2 + 3 + 13 + 202 + 3 + 443 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 231320234394 and 231320234403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 428370535 + ... + 428371074.

It is an arithmetic number, because the mean of its divisors is an integer number (19276686225).

Almost surely, 2^231320234430 is an apocalyptic number.

231320234430 is an abundant number, since it is smaller than the sum of its proper divisors (385533724770).

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

231320234430 is a wasteful number, since it uses less digits than its factorization.

231320234430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856741625 (or 856741619 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 231320234430 its reverse (34432023132), we get a palindrome (265752257562).

The spelling of 231320234430 in words is "two hundred thirty-one billion, three hundred twenty million, two hundred thirty-four thousand, four hundred thirty".