203444331421 has 8 divisors (see below), whose sum is σ = 216336162744. Its totient is φ = 190655224320.

The previous prime is 203444331407. The next prime is 203444331427. The reversal of 203444331421 is 124133444302.

It can be written as a sum of positive squares in 4 ways, for example, as 683247321 + 202761084100 = 26139^2 + 450290^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203444331421 - 2³³ = 194854396829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203444331427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25676970 + ... + 25684891.

It is an arithmetic number, because the mean of its divisors is an integer number (27042020343).

Almost surely, 2^203444331421 is an apocalyptic number.

It is an amenable number.

203444331421 is a deficient number, since it is larger than the sum of its proper divisors (12891831323).

203444331421 is a wasteful number, since it uses less digits than its factorization.

203444331421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51362111.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 203444331421 its reverse (124133444302), we get a palindrome (327577775723).

The spelling of 203444331421 in words is "two hundred three billion, four hundred forty-four million, three hundred thirty-one thousand, four hundred twenty-one".