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13214143 = 37357139
BaseRepresentation
bin110010011010…
…000110111111
3220212100101201
4302122012333
511340323033
61151120331
7220214125
oct62320677
926770351
1013214143
117505a88
1245130a7
132978827
141a7d915
15126047d
hexc9a1bf

13214143 has 4 divisors (see below), whose sum is σ = 13571320. Its totient is φ = 12856968.

The previous prime is 13214141. The next prime is 13214147. The reversal of 13214143 is 34141231.

13214143 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34141231 = 41598209.

It is a cyclic number.

It is not a de Polignac number, because 13214143 - 21 = 13214141 is a prime.

It is a super-2 number, since 2×132141432 = 349227150448898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13214143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13214141) 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, 178533 + ... + 178606.

It is an arithmetic number, because the mean of its divisors is an integer number (3392830).

Almost surely, 213214143 is an apocalyptic number.

13214143 is a deficient number, since it is larger than the sum of its proper divisors (357177).

13214143 is an equidigital number, since it uses as much as digits as its factorization.

13214143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357176.

The product of its digits is 288, while the sum is 19.

The square root of 13214143 is about 3635.1262701590. The cubic root of 13214143 is about 236.4175255153.

Adding to 13214143 its reverse (34141231), we get a palindrome (47355374).

The spelling of 13214143 in words is "thirteen million, two hundred fourteen thousand, one hundred forty-three".

Divisors: 1 37 357139 13214143