200438021 has 4 divisors (see below), whose sum is σ = 229072032. Its totient is φ = 171804012.

The previous prime is 200437969. The next prime is 200438023. The reversal of 200438021 is 120834002.

200438021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120834002 = 2 ⋅60417001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200438021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 200437984 and 200438002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200438023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14316995 + ... + 14317008.

It is an arithmetic number, because the mean of its divisors is an integer number (57268008).

Almost surely, 2^200438021 is an apocalyptic number.

It is an amenable number.

200438021 is a deficient number, since it is larger than the sum of its proper divisors (28634011).

200438021 is an equidigital number, since it uses as much as digits as its factorization.

200438021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28634010.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 200438021 is about 14157.6135347734. The cubic root of 200438021 is about 585.2301634074.

The spelling of 200438021 in words is "two hundred million, four hundred thirty-eight thousand, twenty-one".