Search a number
-
+
22212012 = 2234739383
BaseRepresentation
bin101010010111…
…0110110101100
31112210111011010
41110232312230
521141241022
62112025220
7356541024
oct124566654
945714133
1022212012
11115a1239
127532210
1347a9204
142d42a84
151e3b50c
hex152edac

22212012 has 24 divisors (see below), whose sum is σ = 52932096. Its totient is φ = 7246288.

The previous prime is 22211993. The next prime is 22212017. The reversal of 22212012 is 21021222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (22212017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19128 + ... + 20255.

It is an arithmetic number, because the mean of its divisors is an integer number (2205504).

Almost surely, 222212012 is an apocalyptic number.

It is an amenable number.

22212012 is an abundant number, since it is smaller than the sum of its proper divisors (30720084).

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

22212012 is a wasteful number, since it uses less digits than its factorization.

22212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39437 (or 39435 counting only the distinct ones).

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

The square root of 22212012 is about 4712.9621258822. The cubic root of 22212012 is about 281.1011569964.

Adding to 22212012 its reverse (21021222), we get a palindrome (43233234).

The spelling of 22212012 in words is "twenty-two million, two hundred twelve thousand, twelve".

Divisors: 1 2 3 4 6 12 47 94 141 188 282 564 39383 78766 118149 157532 236298 472596 1851001 3702002 5553003 7404004 11106006 22212012