200318161 has 4 divisors (see below), whose sum is σ = 200512000. Its totient is φ = 200124324.

The previous prime is 200318149. The next prime is 200318171. The reversal of 200318161 is 161813002.

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 200318161 - 2²³ = 191929553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200318101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95361 + ... + 97438.

It is an arithmetic number, because the mean of its divisors is an integer number (50128000).

Almost surely, 2^200318161 is an apocalyptic number.

It is an amenable number.

200318161 is a deficient number, since it is larger than the sum of its proper divisors (193839).

200318161 is a wasteful number, since it uses less digits than its factorization.

200318161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193838.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 200318161 is about 14153.3798436981. The cubic root of 200318161 is about 585.1134861526.

It can be divided in two parts, 2003 and 18161, that added together give a square (20164 = 142²).

The spelling of 200318161 in words is "two hundred million, three hundred eighteen thousand, one hundred sixty-one".