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22143340 = 2251107167
BaseRepresentation
bin101010001111…
…0000101101100
31112122222221201
41110132011230
521132041330
62110335244
7356133562
oct124360554
945588851
1022143340
111155468a
1274ba524
134783b8b
142d25a32
151e25eca
hex151e16c

22143340 has 12 divisors (see below), whose sum is σ = 46501056. Its totient is φ = 8857328.

The previous prime is 22143311. The next prime is 22143343. The reversal of 22143340 is 4334122.

It is not an unprimeable number, because it can be changed into a prime (22143343) 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, 553564 + ... + 553603.

It is an arithmetic number, because the mean of its divisors is an integer number (3875088).

Almost surely, 222143340 is an apocalyptic number.

22143340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22143340 is an abundant number, since it is smaller than the sum of its proper divisors (24357716).

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

22143340 is a wasteful number, since it uses less digits than its factorization.

22143340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107176 (or 1107174 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 22143340 is about 4705.6710467265. The cubic root of 22143340 is about 280.8111681610.

Adding to 22143340 its reverse (4334122), we get a palindrome (26477462).

The spelling of 22143340 in words is "twenty-two million, one hundred forty-three thousand, three hundred forty".

Divisors: 1 2 4 5 10 20 1107167 2214334 4428668 5535835 11071670 22143340