200402421 has 8 divisors (see below), whose sum is σ = 270422880. Its totient is φ = 131991792.

The previous prime is 200402417. The next prime is 200402429. The reversal of 200402421 is 124204002.

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

It is not a de Polignac number, because 200402421 - 2² = 200402417 is a prime.

It is a super-2 number, since 2×200402421² = 80322260685322482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200402421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200402429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402166 + ... + 402663.

It is an arithmetic number, because the mean of its divisors is an integer number (33802860).

Almost surely, 2^200402421 is an apocalyptic number.

It is an amenable number.

200402421 is a deficient number, since it is larger than the sum of its proper divisors (70020459).

200402421 is an equidigital number, since it uses as much as digits as its factorization.

200402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804915.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 200402421 is about 14156.3562048996. The cubic root of 200402421 is about 585.1955135819.

Adding to 200402421 its reverse (124204002), we get a palindrome (324606423).

The spelling of 200402421 in words is "two hundred million, four hundred two thousand, four hundred twenty-one".