231142012 has 12 divisors (see below), whose sum is σ = 404640936. Its totient is φ = 115530320.

The previous prime is 231142007. The next prime is 231142031. The reversal of 231142012 is 210241132.

It is a super-2 number, since 2×231142012² = 106853259422816288, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 5187 + ... + 22117.

It is an arithmetic number, because the mean of its divisors is an integer number (33720078).

Almost surely, 2^231142012 is an apocalyptic number.

It is an amenable number.

231142012 is a deficient number, since it is larger than the sum of its proper divisors (173498924).

231142012 is a wasteful number, since it uses less digits than its factorization.

231142012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20348 (or 20346 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 231142012 is about 15203.3552875673. The cubic root of 231142012 is about 613.7049550276.

Adding to 231142012 its reverse (210241132), we get a palindrome (441383144).

The spelling of 231142012 in words is "two hundred thirty-one million, one hundred forty-two thousand, twelve".