200721081 has 8 divisors (see below), whose sum is σ = 291957984. Its totient is φ = 121649120.

The previous prime is 200721061. The next prime is 200721083. The reversal of 200721081 is 180127002.

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 200721081 - 2¹¹ = 200719033 is a prime.

It is a super-2 number, since 2×200721081² = 80577904715617122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (200721083) 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, 3041196 + ... + 3041261.

It is an arithmetic number, because the mean of its divisors is an integer number (36494748).

Almost surely, 2^200721081 is an apocalyptic number.

It is an amenable number.

200721081 is a deficient number, since it is larger than the sum of its proper divisors (91236903).

200721081 is a wasteful number, since it uses less digits than its factorization.

200721081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6082471.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 200721081 is about 14167.6067492008. The cubic root of 200721081 is about 585.5055225609.

Adding to 200721081 its reverse (180127002), we get a palindrome (380848083).

The spelling of 200721081 in words is "two hundred million, seven hundred twenty-one thousand, eighty-one".