231231016 has 32 divisors (see below), whose sum is σ = 439538400. Its totient is φ = 114030400.

The previous prime is 231230963. The next prime is 231231017. The reversal of 231231016 is 610132132.

It is a junction number, because it is equal to n+sod(n) for n = 231230984 and 231231002.

It is not an unprimeable number, because it can be changed into a prime (231231017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338211 + ... + 338893.

It is an arithmetic number, because the mean of its divisors is an integer number (13735575).

Almost surely, 2^231231016 is an apocalyptic number.

It is an amenable number.

231231016 is a deficient number, since it is larger than the sum of its proper divisors (208307384).

231231016 is a wasteful number, since it uses less digits than its factorization.

231231016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1205 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 231231016 is about 15206.2821228596. The cubic root of 231231016 is about 613.7837164001.

Adding to 231231016 its reverse (610132132), we get a palindrome (841363148).

The spelling of 231231016 in words is "two hundred thirty-one million, two hundred thirty-one thousand, sixteen".