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312130311223 = 1937423438979
BaseRepresentation
bin1001000101011000110…
…10101001010000110111
31002211122220020200111011
410202230122221100313
520103220324424343
6355220215453051
731356610604233
oct4425432512067
91084586220434
10312130311223
111104124726a5
12505ab987187
1323583c8a763
14111701a15c3
1581bc5c029d
hex48ac6a9437

312130311223 has 8 divisors (see below), whose sum is σ = 328567750400. Its totient is φ = 295693824888.

The previous prime is 312130311217. The next prime is 312130311247. The reversal of 312130311223 is 322113031213.

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

It is a cyclic number.

It is not a de Polignac number, because 312130311223 - 237 = 174691357751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312130311194 and 312130311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312130311523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491548 + ... + 930526.

It is an arithmetic number, because the mean of its divisors is an integer number (41070968800).

Almost surely, 2312130311223 is an apocalyptic number.

312130311223 is a deficient number, since it is larger than the sum of its proper divisors (16437439177).

312130311223 is a wasteful number, since it uses less digits than its factorization.

312130311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476421.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 312130311223 its reverse (322113031213), we get a palindrome (634243342436).

The spelling of 312130311223 in words is "three hundred twelve billion, one hundred thirty million, three hundred eleven thousand, two hundred twenty-three".

Divisors: 1 19 37423 438979 711037 8340601 16427911117 312130311223