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1230105313 = 2115829883
BaseRepresentation
bin100100101010001…
…1110101011100001
310011201122211021001
41021110132223201
510004401332223
6322021232001
742324502603
oct11124365341
93151584231
101230105313
115813a9368
122a3b62601
13167b05388
14b9529173
1572ed59ad
hex4951eae1

1230105313 has 4 divisors (see below), whose sum is σ = 1235935408. Its totient is φ = 1224275220.

The previous prime is 1230105311. The next prime is 1230105323. The reversal of 1230105313 is 3135010321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1230105313 - 21 = 1230105311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230105311) 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, 2914731 + ... + 2915152.

It is an arithmetic number, because the mean of its divisors is an integer number (308983852).

Almost surely, 21230105313 is an apocalyptic number.

It is an amenable number.

1230105313 is a deficient number, since it is larger than the sum of its proper divisors (5830095).

1230105313 is an equidigital number, since it uses as much as digits as its factorization.

1230105313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830094.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 1230105313 is about 35072.8572118098. The cubic root of 1230105313 is about 1071.4718478681.

Adding to 1230105313 its reverse (3135010321), we get a palindrome (4365115634).

The spelling of 1230105313 in words is "one billion, two hundred thirty million, one hundred five thousand, three hundred thirteen".

Divisors: 1 211 5829883 1230105313