231420432 has 40 divisors (see below), whose sum is σ = 599460640. Its totient is φ = 76930560.

The previous prime is 231420421. The next prime is 231420451. The reversal of 231420432 is 234024132.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 231420399 and 231420408.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11832 + ... + 24552.

It is an arithmetic number, because the mean of its divisors is an integer number (14986516).

Almost surely, 2^231420432 is an apocalyptic number.

It is an amenable number.

231420432 is an abundant number, since it is smaller than the sum of its proper divisors (368040208).

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

231420432 is a wasteful number, since it uses less digits than its factorization.

231420432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13111 (or 13105 counting only the distinct ones).

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

The square root of 231420432 is about 15212.5090632676. The cubic root of 231420432 is about 613.9512670564.

Adding to 231420432 its reverse (234024132), we get a palindrome (465444564).

It can be divided in two parts, 23 and 1420432, that added together give a triangular number (1420455 = T₁₆₈₅).

The spelling of 231420432 in words is "two hundred thirty-one million, four hundred twenty thousand, four hundred thirty-two".