203123312 has 60 divisors (see below), whose sum is σ = 458403696. Its totient is φ = 85413120.

The previous prime is 203123287. The next prime is 203123321. The reversal of 203123312 is 213321302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 389612 + ... + 390132.

Almost surely, 2^203123312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203123312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229201848).

203123312 is an abundant number, since it is smaller than the sum of its proper divisors (255280384).

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

203123312 is an equidigital number, since it uses as much as digits as its factorization.

203123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 203123312 is about 14252.1335946587. The cubic root of 203123312 is about 587.8320435963.

Adding to 203123312 its reverse (213321302), we get a palindrome (416444614).

The spelling of 203123312 in words is "two hundred three million, one hundred twenty-three thousand, three hundred twelve".