231432420 has 24 divisors (see below), whose sum is σ = 648010944. Its totient is φ = 61715296.

The previous prime is 231432419. The next prime is 231432427. The reversal of 231432420 is 24234132.

231432420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231432427) 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, 1928544 + ... + 1928663.

It is an arithmetic number, because the mean of its divisors is an integer number (27000456).

Almost surely, 2^231432420 is an apocalyptic number.

231432420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231432420 is an abundant number, since it is smaller than the sum of its proper divisors (416578524).

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

231432420 is a wasteful number, since it uses less digits than its factorization.

231432420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3857219 (or 3857217 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 231432420 is about 15212.9030760076. The cubic root of 231432420 is about 613.9618681380.

Adding to 231432420 its reverse (24234132), we get a palindrome (255666552).

The spelling of 231432420 in words is "two hundred thirty-one million, four hundred thirty-two thousand, four hundred twenty".