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BaseRepresentation
bin1100111000001001111…
…0010101011010110111
3210011001001122102001021
43032002132111122313
512111040433302411
6245344400242011
721661225466044
oct3160236253267
9704031572037
10221232322231
1185907973148
1236a62310307
1317b290c725b
14a9c9d0c1cb
155b4c4b2a71
hex33827956b7

221232322231 has 4 divisors (see below), whose sum is σ = 222073510032. Its totient is φ = 220391134432.

The previous prime is 221232322229. The next prime is 221232322247. The reversal of 221232322231 is 132223232122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221232322231 - 21 = 221232322229 is a prime.

It is a super-2 number, since 2×2212323222312 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221232322196 and 221232322205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232322331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420593506 + ... + 420594031.

It is an arithmetic number, because the mean of its divisors is an integer number (55518377508).

Almost surely, 2221232322231 is an apocalyptic number.

221232322231 is a deficient number, since it is larger than the sum of its proper divisors (841187801).

221232322231 is an equidigital number, since it uses as much as digits as its factorization.

221232322231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841187800.

The product of its digits is 3456, while the sum is 25.

Adding to 221232322231 its reverse (132223232122), we get a palindrome (353455554353).

The spelling of 221232322231 in words is "two hundred twenty-one billion, two hundred thirty-two million, three hundred twenty-two thousand, two hundred thirty-one".

Divisors: 1 263 841187537 221232322231