203312130 has 64 divisors (see below), whose sum is σ = 569548800. Its totient is φ = 45480384.

The previous prime is 203312117. The next prime is 203312147. The reversal of 203312130 is 31213302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 430 + ... + 20169.

It is an arithmetic number, because the mean of its divisors is an integer number (8899200).

Almost surely, 2^203312130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203312130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284774400).

203312130 is an abundant number, since it is smaller than the sum of its proper divisors (366236670).

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

203312130 is a wasteful number, since it uses less digits than its factorization.

203312130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20663.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 203312130 is about 14258.7562571214. The cubic root of 203312130 is about 588.0141315036.

Adding to 203312130 its reverse (31213302), we get a palindrome (234525432).

The spelling of 203312130 in words is "two hundred three million, three hundred twelve thousand, one hundred thirty".