231140402 has 16 divisors (see below), whose sum is σ = 359251200. Its totient is φ = 111418320.

The previous prime is 231140389. The next prime is 231140417. The reversal of 231140402 is 204041132.

231140402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 9749 + ... + 23607.

It is an arithmetic number, because the mean of its divisors is an integer number (22453200).

Almost surely, 2^231140402 is an apocalyptic number.

231140402 is a deficient number, since it is larger than the sum of its proper divisors (128110798).

231140402 is a wasteful number, since it uses less digits than its factorization.

231140402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14161.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 231140402 is about 15203.3023386368. The cubic root of 231140402 is about 613.7035301211.

Adding to 231140402 its reverse (204041132), we get a palindrome (435181534).

The spelling of 231140402 in words is "two hundred thirty-one million, one hundred forty thousand, four hundred two".