200543421 has 16 divisors (see below), whose sum is σ = 289900800. Its totient is φ = 122579520.

The previous prime is 200543411. The next prime is 200543429. The reversal of 200543421 is 124345002.

It is not a de Polignac number, because 200543421 - 2⁵ = 200543389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200543429) 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, 11445 + ... + 23066.

It is an arithmetic number, because the mean of its divisors is an integer number (18118800).

Almost surely, 2^200543421 is an apocalyptic number.

It is an amenable number.

200543421 is a deficient number, since it is larger than the sum of its proper divisors (89357379).

200543421 is a wasteful number, since it uses less digits than its factorization.

200543421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34676.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 200543421 is about 14161.3354243165. The cubic root of 200543421 is about 585.3327262014.

Adding to 200543421 its reverse (124345002), we get a palindrome (324888423).

The spelling of 200543421 in words is "two hundred million, five hundred forty-three thousand, four hundred twenty-one".