231040342 has 32 divisors (see below), whose sum is σ = 399571200. Its totient is φ = 99296928.

The previous prime is 231040339. The next prime is 231040343. The reversal of 231040342 is 243040132.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231040343) 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, 25183 + ... + 33109.

It is an arithmetic number, because the mean of its divisors is an integer number (12486600).

Almost surely, 2^231040342 is an apocalyptic number.

231040342 is a deficient number, since it is larger than the sum of its proper divisors (168530858).

231040342 is a wasteful number, since it uses less digits than its factorization.

231040342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8020.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 231040342 is about 15200.0112499958. The cubic root of 231040342 is about 613.6149605218.

Adding to 231040342 its reverse (243040132), we get a palindrome (474080474).

The spelling of 231040342 in words is "two hundred thirty-one million, forty thousand, three hundred forty-two".