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312201413 = 1771258659
BaseRepresentation
bin10010100110111…
…101000011000101
3210202110110211022
4102212331003011
51114410421123
650551320525
710510445126
oct2246750305
9722413738
10312201413
111502585a7
1288680145
134c8b0684
142d66c04d
151c61e1c8
hex129bd0c5

312201413 has 8 divisors (see below), whose sum is σ = 335223360. Its totient is φ = 289696960.

The previous prime is 312201377. The next prime is 312201451. The reversal of 312201413 is 314102213.

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 312201413 - 28 = 312201157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312201391 and 312201400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312201493) 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, 128123 + ... + 130536.

It is an arithmetic number, because the mean of its divisors is an integer number (41902920).

Almost surely, 2312201413 is an apocalyptic number.

It is an amenable number.

312201413 is a deficient number, since it is larger than the sum of its proper divisors (23021947).

312201413 is a wasteful number, since it uses less digits than its factorization.

312201413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258747.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 312201413 is about 17669.2221956712. Note that the first 3 decimals coincide. The cubic root of 312201413 is about 678.3882046593.

Adding to 312201413 its reverse (314102213), we get a palindrome (626303626).

The spelling of 312201413 in words is "three hundred twelve million, two hundred one thousand, four hundred thirteen".

Divisors: 1 17 71 1207 258659 4397203 18364789 312201413