203223130440 has 256 divisors, whose sum is σ = 701818214400. Its totient is φ = 46594099200.

The previous prime is 203223130391. The next prime is 203223130499. The reversal of 203223130440 is 44031322302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 203223130440.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2664435 + ... + 2739645.

It is an arithmetic number, because the mean of its divisors is an integer number (2741477400).

Almost surely, 2^203223130440 is an apocalyptic number.

203223130440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203223130440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350909107200).

203223130440 is an abundant number, since it is smaller than the sum of its proper divisors (498595083960).

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

203223130440 is a wasteful number, since it uses less digits than its factorization.

203223130440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75348 (or 75344 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 203223130440 its reverse (44031322302), we get a palindrome (247254452742).

The spelling of 203223130440 in words is "two hundred three billion, two hundred twenty-three million, one hundred thirty thousand, four hundred forty".