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223013231 = 7103309311
BaseRepresentation
bin11010100101011…
…10100101101111
3120112122020122022
431102232211233
5424042410411
634043540355
75345403230
oct1522564557
9515566568
10223013231
11104981161
126282a6bb
13372840bc
1421893087
15148a2edb
hexd4ae96f

223013231 has 8 divisors (see below), whose sum is σ = 257347584. Its totient is φ = 189297720.

The previous prime is 223013209. The next prime is 223013233. The reversal of 223013231 is 132310322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-223013231 is a prime.

It is a super-2 number, since 2×2230132312 = 99469802402118722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223013233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153935 + ... + 155376.

It is an arithmetic number, because the mean of its divisors is an integer number (32168448).

Almost surely, 2223013231 is an apocalyptic number.

223013231 is a deficient number, since it is larger than the sum of its proper divisors (34334353).

223013231 is a wasteful number, since it uses less digits than its factorization.

223013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309421.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 223013231 is about 14933.6275231439. The cubic root of 223013231 is about 606.4246924070.

Adding to 223013231 its reverse (132310322), we get a palindrome (355323553).

The spelling of 223013231 in words is "two hundred twenty-three million, thirteen thousand, two hundred thirty-one".

Divisors: 1 7 103 721 309311 2165177 31859033 223013231