200421761 has 4 divisors (see below), whose sum is σ = 203818800. Its totient is φ = 197024724.

The previous prime is 200421757. The next prime is 200421787. The reversal of 200421761 is 167124002.

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.

It is a cyclic number.

It is not a de Polignac number, because 200421761 - 2² = 200421757 is a prime.

It is a super-2 number, since 2×200421761² = 80337764564682242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200421731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1698431 + ... + 1698548.

It is an arithmetic number, because the mean of its divisors is an integer number (50954700).

Almost surely, 2^200421761 is an apocalyptic number.

It is an amenable number.

200421761 is a deficient number, since it is larger than the sum of its proper divisors (3397039).

200421761 is an equidigital number, since it uses as much as digits as its factorization.

200421761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397038.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 200421761 is about 14157.0392738030. The cubic root of 200421761 is about 585.2143379007.

Adding to 200421761 its reverse (167124002), we get a palindrome (367545763).

The spelling of 200421761 in words is "two hundred million, four hundred twenty-one thousand, seven hundred sixty-one".