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215056230 = 2357168541
BaseRepresentation
bin11001101000101…
…11111101100110
3112222122222200120
430310113331212
5420023244410
633201222410
75220643044
oct1464277546
9488588616
10215056230
11100436a24
1260031a06
133572940c
14207c1394
1513d30570
hexcd17f66

215056230 has 16 divisors (see below), whose sum is σ = 516135024. Its totient is φ = 57348320.

The previous prime is 215056223. The next prime is 215056253. The reversal of 215056230 is 32650512.

It is a self number, because there is not a number n which added to its sum of digits gives 215056230.

It is a congruent number.

It is an unprimeable number.

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, 3584241 + ... + 3584300.

It is an arithmetic number, because the mean of its divisors is an integer number (32258439).

Almost surely, 2215056230 is an apocalyptic number.

215056230 is an abundant number, since it is smaller than the sum of its proper divisors (301078794).

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

215056230 is a wasteful number, since it uses less digits than its factorization.

215056230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7168551.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 215056230 is about 14664.7956003485. The cubic root of 215056230 is about 599.1248630684.

The spelling of 215056230 in words is "two hundred fifteen million, fifty-six thousand, two hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 7168541 14337082 21505623 35842705 43011246 71685410 107528115 215056230