Search a number
-
+
200931 = 366977
BaseRepresentation
bin110001000011100011
3101012121220
4301003203
522412211
64150123
71464543
oct610343
9335556
10200931
11127a65
1298343
13705c3
1453323
153e806
hex310e3

200931 has 4 divisors (see below), whose sum is σ = 267912. Its totient is φ = 133952.

The previous prime is 200929. The next prime is 200971. The reversal of 200931 is 139002.

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

It is a cyclic number.

It is not a de Polignac number, because 200931 - 21 = 200929 is a prime.

It is a super-2 number, since 2×2009312 = 80746533522, which contains 22 as substring.

It is a D-number.

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 200931.

It is not an unprimeable number, because it can be changed into a prime (200971) 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, 33486 + ... + 33491.

It is an arithmetic number, because the mean of its divisors is an integer number (66978).

2200931 is an apocalyptic number.

200931 is the 284-th centered pentagonal number.

200931 is a deficient number, since it is larger than the sum of its proper divisors (66981).

200931 is an equidigital number, since it uses as much as digits as its factorization.

200931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66980.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 200931 is about 448.2532766194. The cubic root of 200931 is about 58.5709563430.

Adding to 200931 its reverse (139002), we get a palindrome (339933).

The spelling of 200931 in words is "two hundred thousand, nine hundred thirty-one".

Divisors: 1 3 66977 200931