231215112 has 48 divisors (see below), whose sum is σ = 646414080. Its totient is φ = 74584800.

The previous prime is 231215107. The next prime is 231215129. The reversal of 231215112 is 211512132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49564 + ... + 54027.

It is an arithmetic number, because the mean of its divisors is an integer number (13466960).

Almost surely, 2^231215112 is an apocalyptic number.

It is an amenable number.

231215112 is an abundant number, since it is smaller than the sum of its proper divisors (415198968).

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

231215112 is a wasteful number, since it uses less digits than its factorization.

231215112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103634 (or 103627 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 231215112 is about 15205.7591721032. The cubic root of 231215112 is about 613.7696441241.

Adding to 231215112 its reverse (211512132), we get a palindrome (442727244).

It can be divided in two parts, 2312 and 15112, that added together give a square (17424 = 132²).

The spelling of 231215112 in words is "two hundred thirty-one million, two hundred fifteen thousand, one hundred twelve".