Search a number
-
+
213011 = 293727
BaseRepresentation
bin110100000000010011
3101211012022
4310000103
523304021
64322055
71545011
oct640023
9354168
10213011
11136047
12a332b
1375c56
14578b1
15431ab
hex34013

213011 has 4 divisors (see below), whose sum is σ = 214032. Its totient is φ = 211992.

The previous prime is 212999. The next prime is 213019. The reversal of 213011 is 110312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-213011 is a prime.

It is a super-2 number, since 2×2130112 = 90747372242, which contains 22 as substring.

It is an Ulam number.

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 213011.

It is not an unprimeable number, because it can be changed into a prime (213019) 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, 71 + ... + 656.

It is an arithmetic number, because the mean of its divisors is an integer number (53508).

2213011 is an apocalyptic number.

213011 is a deficient number, since it is larger than the sum of its proper divisors (1021).

213011 is an equidigital number, since it uses as much as digits as its factorization.

213011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 213011 is about 461.5311473779. The cubic root of 213011 is about 59.7219542403.

Adding to 213011 its reverse (110312), we get a palindrome (323323).

The spelling of 213011 in words is "two hundred thirteen thousand, eleven".

Divisors: 1 293 727 213011