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220224421 = 1911590759
BaseRepresentation
bin11010010000001…
…01101110100101
3120100101120010001
431020011232211
5422334140141
633504101301
75312606464
oct1510055645
9510346101
10220224421
1110334695a
1261904831
1336818911
14213689db
1514501a31
hexd205ba5

220224421 has 4 divisors (see below), whose sum is σ = 231815200. Its totient is φ = 208633644.

The previous prime is 220224419. The next prime is 220224461. The reversal of 220224421 is 124422022.

220224421 = 13332 + 13342 + ... + 14462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220224421 - 21 = 220224419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 11590759 = 220224421 / (2 + 2 + 0 + 2 + 2 + 4 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220224401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5795361 + ... + 5795398.

It is an arithmetic number, because the mean of its divisors is an integer number (57953800).

Almost surely, 2220224421 is an apocalyptic number.

It is an amenable number.

220224421 is a deficient number, since it is larger than the sum of its proper divisors (11590779).

220224421 is a wasteful number, since it uses less digits than its factorization.

220224421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11590778.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 220224421 is about 14839.9602762272. The cubic root of 220224421 is about 603.8862746938.

Adding to 220224421 its reverse (124422022), we get a palindrome (344646443).

The spelling of 220224421 in words is "two hundred twenty million, two hundred twenty-four thousand, four hundred twenty-one".

Divisors: 1 19 11590759 220224421