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216530222 = 2472303513
BaseRepresentation
bin11001110011111…
…11110100101110
3120002102212121212
430321333310232
5420412431342
633252554422
75236322306
oct1471776456
9502385555
10216530222
111012533a7
1260622a12
1335b242bc
1420a86606
1514022182
hexce7fd2e

216530222 has 8 divisors (see below), whose sum is σ = 331706016. Its totient is φ = 105961552.

The previous prime is 216530219. The next prime is 216530233. The reversal of 216530222 is 222035612.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1151663 + ... + 1151850.

It is an arithmetic number, because the mean of its divisors is an integer number (41463252).

Almost surely, 2216530222 is an apocalyptic number.

216530222 is a deficient number, since it is larger than the sum of its proper divisors (115175794).

216530222 is a wasteful number, since it uses less digits than its factorization.

216530222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303562.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 216530222 is about 14714.9659190907. The cubic root of 216530222 is about 600.4905451295.

Adding to 216530222 its reverse (222035612), we get a palindrome (438565834).

The spelling of 216530222 in words is "two hundred sixteen million, five hundred thirty thousand, two hundred twenty-two".

Divisors: 1 2 47 94 2303513 4607026 108265111 216530222