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213242 = 2106621
BaseRepresentation
bin110100000011111010
3101211111212
4310003322
523310432
64323122
71545461
oct640372
9354455
10213242
11136237
12a34a2
13760a3
14579d8
15432b2
hex340fa

213242 has 4 divisors (see below), whose sum is σ = 319866. Its totient is φ = 106620.

The previous prime is 213229. The next prime is 213247. The reversal of 213242 is 242312.

213242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 160801 + 52441 = 401^2 + 229^2 .

It is not an unprimeable number, because it can be changed into a prime (213247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53309 + ... + 53312.

2213242 is an apocalyptic number.

213242 is a deficient number, since it is larger than the sum of its proper divisors (106624).

213242 is a wasteful number, since it uses less digits than its factorization.

213242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106623.

The product of its digits is 96, while the sum is 14.

The square root of 213242 is about 461.7813335335. The cubic root of 213242 is about 59.7435349529.

Adding to 213242 its reverse (242312), we get a palindrome (455554).

The spelling of 213242 in words is "two hundred thirteen thousand, two hundred forty-two".

Divisors: 1 2 106621 213242