200421237 has 8 divisors (see below), whose sum is σ = 273443104. Its totient is φ = 130506768.

The previous prime is 200421229. The next prime is 200421239. The reversal of 200421237 is 732124002.

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

It is not a de Polignac number, because 200421237 - 2³ = 200421229 is a prime.

It is a super-2 number, since 2×200421237² = 80337344481220338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200421239) 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, 776698 + ... + 776955.

It is an arithmetic number, because the mean of its divisors is an integer number (34180388).

Almost surely, 2^200421237 is an apocalyptic number.

It is an amenable number.

200421237 is a deficient number, since it is larger than the sum of its proper divisors (73021867).

200421237 is a wasteful number, since it uses less digits than its factorization.

200421237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553699.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 200421237 is about 14157.0207670964. The cubic root of 200421237 is about 585.2138278885.

Adding to 200421237 its reverse (732124002), we get a palindrome (932545239).

The spelling of 200421237 in words is "two hundred million, four hundred twenty-one thousand, two hundred thirty-seven".