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BaseRepresentation
bin11010101101000…
…10100010000101
3120121112000021100
431112202202011
5424321344141
634121210313
75360034303
oct1526424205
9517460240
10224012421
111054a3936
1263030999
1337543b39
1421a73273
15149ee0b6
hexd5a2885

224012421 has 6 divisors (see below), whose sum is σ = 323573510. Its totient is φ = 149341608.

The previous prime is 224012407. The next prime is 224012429. The reversal of 224012421 is 124210422.

224012421 is a `hidden beast` number, since 2 + 240 + 1 + 2 + 421 = 666.

It can be written as a sum of positive squares in only one way, i.e., 162562500 + 61449921 = 12750^2 + 7839^2 .

It is not a de Polignac number, because 224012421 - 223 = 215623813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 224012394 and 224012403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (224012429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12445126 + ... + 12445143.

Almost surely, 2224012421 is an apocalyptic number.

It is an amenable number.

224012421 is a deficient number, since it is larger than the sum of its proper divisors (99561089).

224012421 is a wasteful number, since it uses less digits than its factorization.

224012421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24890275 (or 24890272 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 224012421 is about 14967.0444978292. The cubic root of 224012421 is about 607.3290196056.

Adding to 224012421 its reverse (124210422), we get a palindrome (348222843).

The spelling of 224012421 in words is "two hundred twenty-four million, twelve thousand, four hundred twenty-one".

Divisors: 1 3 9 24890269 74670807 224012421