200157421 has 4 divisors (see below), whose sum is σ = 206614144. Its totient is φ = 193700700.

The previous prime is 200157407. The next prime is 200157427. The reversal of 200157421 is 124751002.

It is a happy number.

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 200157421 - 2⁹ = 200156909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200157392 and 200157401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200157427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3228315 + ... + 3228376.

It is an arithmetic number, because the mean of its divisors is an integer number (51653536).

Almost surely, 2^200157421 is an apocalyptic number.

It is an amenable number.

200157421 is a deficient number, since it is larger than the sum of its proper divisors (6456723).

200157421 is an equidigital number, since it uses as much as digits as its factorization.

200157421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456722.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 200157421 is about 14147.7002017996. The cubic root of 200157421 is about 584.9569413361.

The spelling of 200157421 in words is "two hundred million, one hundred fifty-seven thousand, four hundred twenty-one".