203231131220 has 48 divisors (see below), whose sum is σ = 479598295680. Its totient is φ = 71776611456.

The previous prime is 203231131183. The next prime is 203231131231. The reversal of 203231131220 is 22131132302.

203231131220 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 203231131192 and 203231131201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16986590 + ... + 16998549.

It is an arithmetic number, because the mean of its divisors is an integer number (9991631160).

Almost surely, 2^203231131220 is an apocalyptic number.

203231131220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203231131220 is an abundant number, since it is smaller than the sum of its proper divisors (276367164460).

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

203231131220 is a wasteful number, since it uses less digits than its factorization.

203231131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33985184 (or 33985182 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 203231131220 its reverse (22131132302), we get a palindrome (225362263522).

The spelling of 203231131220 in words is "two hundred three billion, two hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty".