Search a number
-
+
221412 = 22318451
BaseRepresentation
bin110110000011100100
3102020201110
4312003210
524041122
64425020
71611342
oct660344
9366643
10221412
11141394
12a8170
1379a19
145a992
154590c
hex360e4

221412 has 12 divisors (see below), whose sum is σ = 516656. Its totient is φ = 73800.

The previous prime is 221411. The next prime is 221413. The reversal of 221412 is 214122.

It is an interprime number because it is at equal distance from previous prime (221411) and next prime (221413).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 18451 = 221412 / (2 + 2 + 1 + 4 + 1 + 2).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (221411) 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, 9214 + ... + 9237.

2221412 is an apocalyptic number.

It is an amenable number.

221412 is an abundant number, since it is smaller than the sum of its proper divisors (295244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221412 is a wasteful number, since it uses less digits than its factorization.

221412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18458 (or 18456 counting only the distinct ones).

The product of its digits is 32, while the sum is 12.

The square root of 221412 is about 470.5443656022. The cubic root of 221412 is about 60.4969832068.

Adding to 221412 its reverse (214122), we get a palindrome (435534).

It can be divided in two parts, 2 and 21412, that multiplied together give a palindrome (42824).

The spelling of 221412 in words is "two hundred twenty-one thousand, four hundred twelve", and thus it is an iban number.

Divisors: 1 2 3 4 6 12 18451 36902 55353 73804 110706 221412