210231312 has 20 divisors (see below), whose sum is σ = 543097680. Its totient is φ = 70077088.

The previous prime is 210231311. The next prime is 210231323. The reversal of 210231312 is 213132012.

It is a junction number, because it is equal to n+sod(n) for n = 210231291 and 210231300.

It is not an unprimeable number, because it can be changed into a prime (210231311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2189862 + ... + 2189957.

It is an arithmetic number, because the mean of its divisors is an integer number (27154884).

Almost surely, 2^210231312 is an apocalyptic number.

It is an amenable number.

210231312 is an abundant number, since it is smaller than the sum of its proper divisors (332866368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210231312 is a wasteful number, since it uses less digits than its factorization.

210231312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379830 (or 4379824 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 210231312 is about 14499.3555718866. The cubic root of 210231312 is about 594.6103533672.

Adding to 210231312 its reverse (213132012), we get a palindrome (423363324).

The spelling of 210231312 in words is "two hundred ten million, two hundred thirty-one thousand, three hundred twelve".