231132042 has 20 divisors (see below), whose sum is σ = 517907346. Its totient is φ = 77043960.

The previous prime is 231132029. The next prime is 231132049. The reversal of 231132042 is 240231132.

It can be written as a sum of positive squares in only one way, i.e., 186896241 + 44235801 = 13671^2 + 6651^2 .

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 (231132049) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 713209 + ... + 713532.

Almost surely, 2^231132042 is an apocalyptic number.

231132042 is an abundant number, since it is smaller than the sum of its proper divisors (286775304).

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

231132042 is a wasteful number, since it uses less digits than its factorization.

231132042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426755 (or 1426746 counting only the distinct ones).

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

The square root of 231132042 is about 15203.0273958840. The cubic root of 231132042 is about 613.6961311213.

Adding to 231132042 its reverse (240231132), we get a palindrome (471363174).

The spelling of 231132042 in words is "two hundred thirty-one million, one hundred thirty-two thousand, forty-two".