Search a number
-
+
21401200 = 245253503
BaseRepresentation
bin101000110100…
…0111001110000
31111021021221001
41101220321300
520434314300
62042411344
7346623112
oct121507160
944237831
1021401200
1111098047
127200b54
134584142
142bb13b2
151d2b16a
hex1468e70

21401200 has 30 divisors (see below), whose sum is σ = 51417344. Its totient is φ = 8560320.

The previous prime is 21401137. The next prime is 21401203. The reversal of 21401200 is 210412.

It is a super-2 number, since 2×214012002 = 916022722880000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26352 + ... + 27151.

Almost surely, 221401200 is an apocalyptic number.

21401200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21401200 is an abundant number, since it is smaller than the sum of its proper divisors (30016144).

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

21401200 is a wasteful number, since it uses less digits than its factorization.

21401200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53521 (or 53510 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 21401200 is about 4626.1431019803. The cubic root of 21401200 is about 277.6382991615.

Adding to 21401200 its reverse (210412), we get a palindrome (21611612).

The spelling of 21401200 in words is "twenty-one million, four hundred one thousand, two hundred".

Divisors: 1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 53503 107006 214012 267515 428024 535030 856048 1070060 1337575 2140120 2675150 4280240 5350300 10700600 21401200