203431300221 has 16 divisors (see below), whose sum is σ = 275321240768. Its totient is φ = 133581571200.

The previous prime is 203431300157. The next prime is 203431300229. The reversal of 203431300221 is 122003134302.

It is not a de Polignac number, because 203431300221 - 2⁶ = 203431300157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203431300229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1889481 + ... + 1994241.

It is an arithmetic number, because the mean of its divisors is an integer number (17207577548).

Almost surely, 2^203431300221 is an apocalyptic number.

It is an amenable number.

203431300221 is a deficient number, since it is larger than the sum of its proper divisors (71889940547).

203431300221 is a wasteful number, since it uses less digits than its factorization.

203431300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114492.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 203431300221 its reverse (122003134302), we get a palindrome (325434434523).

The spelling of 203431300221 in words is "two hundred three billion, four hundred thirty-one million, three hundred thousand, two hundred twenty-one".