231103312 has 20 divisors (see below), whose sum is σ = 488468736. Its totient is φ = 105046880.

The previous prime is 231103307. The next prime is 231103343. The reversal of 231103312 is 213301132.

231103312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656368 + ... + 656719.

Almost surely, 2^231103312 is an apocalyptic number.

231103312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231103312 is an abundant number, since it is smaller than the sum of its proper divisors (257365424).

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

231103312 is a wasteful number, since it uses less digits than its factorization.

231103312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313106 (or 1313100 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 231103312 is about 15202.0824889224. The cubic root of 231103312 is about 613.6707023371.

Adding to 231103312 its reverse (213301132), we get a palindrome (444404444).

The spelling of 231103312 in words is "two hundred thirty-one million, one hundred three thousand, three hundred twelve".