203122220240 has 160 divisors (see below), whose sum is σ = 498739078656. Its totient is φ = 76784322560.

The previous prime is 203122220233. The next prime is 203122220291. The reversal of 203122220240 is 42022221302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent 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, 53157530 + ... + 53161350.

Almost surely, 2^203122220240 is an apocalyptic number.

203122220240 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 203122220240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249369539328).

203122220240 is an abundant number, since it is smaller than the sum of its proper divisors (295616858416).

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

203122220240 is a wasteful number, since it uses less digits than its factorization.

203122220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197 (or 4191 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 203122220240 its reverse (42022221302), we get a palindrome (245144441542).

The spelling of 203122220240 in words is "two hundred three billion, one hundred twenty-two million, two hundred twenty thousand, two hundred forty".