200251421 has 8 divisors (see below), whose sum is σ = 207022200. Its totient is φ = 193570560.

The previous prime is 200251411. The next prime is 200251433. The reversal of 200251421 is 124152002.

It can be written as a sum of positive squares in 4 ways, for example, as 19483396 + 180768025 = 4414^2 + 13445^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 200251421 - 2¹⁴ = 200235037 is a prime.

It is a super-2 number, since 2×200251421² = 80201263225038482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200251421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200251411) 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 7 ways as a sum of consecutive naturals, for example, 17936 + ... + 26873.

It is an arithmetic number, because the mean of its divisors is an integer number (25877775).

Almost surely, 2^200251421 is an apocalyptic number.

It is an amenable number.

200251421 is a deficient number, since it is larger than the sum of its proper divisors (6770779).

200251421 is a wasteful number, since it uses less digits than its factorization.

200251421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44959.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 200251421 is about 14151.0219065621. The cubic root of 200251421 is about 585.0484981830.

The spelling of 200251421 in words is "two hundred million, two hundred fifty-one thousand, four hundred twenty-one".