200309881 has 4 divisors (see below), whose sum is σ = 200344564. Its totient is φ = 200275200.

The previous prime is 200309869. The next prime is 200309891. The reversal of 200309881 is 188903002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38638656 + 161671225 = 6216^2 + 12715^2 .

It is a cyclic number.

It is not a de Polignac number, because 200309881 - 2²³ = 191921273 is a prime.

It is a super-2 number, since 2×200309881² = 80248096852468322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200309821) 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, 6360 + ... + 21001.

It is an arithmetic number, because the mean of its divisors is an integer number (50086141).

Almost surely, 2^200309881 is an apocalyptic number.

It is an amenable number.

200309881 is a deficient number, since it is larger than the sum of its proper divisors (34683).

200309881 is an equidigital number, since it uses as much as digits as its factorization.

200309881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34682.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 200309881 is about 14153.0873310384. The cubic root of 200309881 is about 585.1054243001.

The spelling of 200309881 in words is "two hundred million, three hundred nine thousand, eight hundred eighty-one".