231512 has 16 divisors (see below), whose sum is σ = 444840. Its totient is φ = 112896.

The previous prime is 231503. The next prime is 231529. The reversal of 231512 is 215132.

It is a happy number.

It is a super-2 number, since 2×231512² = 107195612288, 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 680.

2²³¹⁵¹² is an apocalyptic number.

It is an amenable number.

231512 is a deficient number, since it is larger than the sum of its proper divisors (213328).

231512 is a wasteful number, since it uses less digits than its factorization.

231512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 718 counting only the distinct ones).

The product of its digits is 60, while the sum is 14.

The square root of 231512 is about 481.1569390542. The cubic root of 231512 is about 61.4032232072.

Adding to 231512 its reverse (215132), we get a palindrome (446644).

The spelling of 231512 in words is "two hundred thirty-one thousand, five hundred twelve".