231313142 has 4 divisors (see below), whose sum is σ = 346969716. Its totient is φ = 115656570.

The previous prime is 231313123. The next prime is 231313153. The reversal of 231313142 is 241313132.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57828284 + ... + 57828287.

It is an arithmetic number, because the mean of its divisors is an integer number (86742429).

Almost surely, 2^231313142 is an apocalyptic number.

231313142 is a deficient number, since it is larger than the sum of its proper divisors (115656574).

231313142 is a wasteful number, since it uses less digits than its factorization.

231313142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115656573.

The product of its digits is 432, while the sum is 20.

The square root of 231313142 is about 15208.9822802185. The cubic root of 231313142 is about 613.8563733701.

Adding to 231313142 its reverse (241313132), we get a palindrome (472626274).

The spelling of 231313142 in words is "two hundred thirty-one million, three hundred thirteen thousand, one hundred forty-two".