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13214473 = 47281159
BaseRepresentation
bin110010011010…
…001100001001
3220212100211221
4302122030021
511340330343
61151122041
7220215106
oct62321411
926770757
1013214473
117506258
124513321
132978a1c
141a7daad
1512605ed
hexc9a309

13214473 has 4 divisors (see below), whose sum is σ = 13495680. Its totient is φ = 12933268.

The previous prime is 13214471. The next prime is 13214479. The reversal of 13214473 is 37441231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37441231 = 43398629.

It is a cyclic number.

It is not a de Polignac number, because 13214473 - 21 = 13214471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13214471) 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, 140533 + ... + 140626.

It is an arithmetic number, because the mean of its divisors is an integer number (3373920).

Almost surely, 213214473 is an apocalyptic number.

It is an amenable number.

13214473 is a deficient number, since it is larger than the sum of its proper divisors (281207).

13214473 is an equidigital number, since it uses as much as digits as its factorization.

13214473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281206.

The product of its digits is 2016, while the sum is 25.

The square root of 13214473 is about 3635.1716603209. The cubic root of 13214473 is about 236.4194935364.

The spelling of 13214473 in words is "thirteen million, two hundred fourteen thousand, four hundred seventy-three".

Divisors: 1 47 281159 13214473