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68231210 = 256823121
BaseRepresentation
bin1000001000100…
…10000000101010
311202101111121212
410010102000222
5114431344320
610434233122
71455645545
oct404220052
9152344555
1068231210
1135573133
121aa257a2
131119c6c8
1490c185c
155ecb9c5
hex411202a

68231210 has 8 divisors (see below), whose sum is σ = 122816196. Its totient is φ = 27292480.

The previous prime is 68231209. The next prime is 68231231. The reversal of 68231210 is 1213286.

It can be written as a sum of positive squares in 2 ways, for example, as 63664441 + 4566769 = 7979^2 + 2137^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3411551 + ... + 3411570.

Almost surely, 268231210 is an apocalyptic number.

68231210 is a deficient number, since it is larger than the sum of its proper divisors (54584986).

68231210 is a wasteful number, since it uses less digits than its factorization.

68231210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6823128.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 68231210 is about 8260.2185201119. The cubic root of 68231210 is about 408.6275944550.

Adding to 68231210 its reverse (1213286), we get a palindrome (69444496).

The spelling of 68231210 in words is "sixty-eight million, two hundred thirty-one thousand, two hundred ten".

Divisors: 1 2 5 10 6823121 13646242 34115605 68231210