231213430 has 64 divisors (see below), whose sum is σ = 505999872. Its totient is φ = 74257920.

The previous prime is 231213397. The next prime is 231213439. The reversal of 231213430 is 34312132.

It is a junction number, because it is equal to n+sod(n) for n = 231213398 and 231213407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231213439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 393597 + ... + 394183.

It is an arithmetic number, because the mean of its divisors is an integer number (7906248).

Almost surely, 2^231213430 is an apocalyptic number.

231213430 is an abundant number, since it is smaller than the sum of its proper divisors (274786442).

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

231213430 is a wasteful number, since it uses less digits than its factorization.

231213430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 231213430 is about 15205.7038640110. The cubic root of 231213430 is about 613.7681558087.

Adding to 231213430 its reverse (34312132), we get a palindrome (265525562).

The spelling of 231213430 in words is "two hundred thirty-one million, two hundred thirteen thousand, four hundred thirty".