203144421 has 8 divisors (see below), whose sum is σ = 270925600. Its totient is φ = 135396432.

The previous prime is 203144401. The next prime is 203144429. The reversal of 203144421 is 124441302.

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

It is not a de Polignac number, because 203144421 - 2²² = 198950117 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 (203144429) 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, 17055 + ... + 26403.

It is an arithmetic number, because the mean of its divisors is an integer number (33865700).

Almost surely, 2^203144421 is an apocalyptic number.

It is an amenable number.

203144421 is a deficient number, since it is larger than the sum of its proper divisors (67781179).

203144421 is an equidigital number, since it uses as much as digits as its factorization.

203144421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16595.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 203144421 is about 14252.8741312060. The cubic root of 203144421 is about 587.8524058033.

Adding to 203144421 its reverse (124441302), we get a palindrome (327585723).

The spelling of 203144421 in words is "two hundred three million, one hundred forty-four thousand, four hundred twenty-one".