231144132 has 24 divisors (see below), whose sum is σ = 542354400. Its totient is φ = 76616896.

The previous prime is 231144131. The next prime is 231144157. The reversal of 231144132 is 231441132.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 231144099 and 231144108.

It is not an unprimeable number, because it can be changed into a prime (231144131) 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, 51657 + ... + 55952.

It is an arithmetic number, because the mean of its divisors is an integer number (22598100).

Almost surely, 2^231144132 is an apocalyptic number.

It is an amenable number.

231144132 is an abundant number, since it is smaller than the sum of its proper divisors (311210268).

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

231144132 is a wasteful number, since it uses less digits than its factorization.

231144132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107795 (or 107793 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 231144132 is about 15203.4250088590. The cubic root of 231144132 is about 613.7068312919.

Adding to 231144132 its reverse (231441132), we get a palindrome (462585264).

The spelling of 231144132 in words is "two hundred thirty-one million, one hundred forty-four thousand, one hundred thirty-two".