231420132 has 48 divisors (see below), whose sum is σ = 601211520. Its totient is φ = 76981536.

The previous prime is 231420121. The next prime is 231420139. The reversal of 231420132 is 231024132.

231420132 is a `hidden beast` number, since 231 + 420 + 13 + 2 = 666.

231420132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (231420139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58233 + ... + 62079.

It is an arithmetic number, because the mean of its divisors is an integer number (12525240).

Almost surely, 2^231420132 is an apocalyptic number.

It is an amenable number.

231420132 is an abundant number, since it is smaller than the sum of its proper divisors (369791388).

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

231420132 is a wasteful number, since it uses less digits than its factorization.

231420132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417 (or 4409 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231420132 is about 15212.4992029581. The cubic root of 231420132 is about 613.9510017593.

Adding to 231420132 its reverse (231024132), we get a palindrome (462444264).

The spelling of 231420132 in words is "two hundred thirty-one million, four hundred twenty thousand, one hundred thirty-two".