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23213001 = 376118121
BaseRepresentation
bin101100010001…
…1001111001001
31121200100020210
41120203033021
521420304001
62145311333
7401210250
oct130431711
947610223
1023213001
11121152a9
127935549
134a69a06
143123797
152087dd6
hex16233c9

23213001 has 16 divisors (see below), whose sum is σ = 35954048. Its totient is φ = 13046400.

The previous prime is 23212999. The next prime is 23213033. The reversal of 23213001 is 10031232.

It is a happy number.

It is not a de Polignac number, because 23213001 - 21 = 23212999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23213401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7780 + ... + 10341.

It is an arithmetic number, because the mean of its divisors is an integer number (2247128).

Almost surely, 223213001 is an apocalyptic number.

23213001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23213001 is a deficient number, since it is larger than the sum of its proper divisors (12741047).

23213001 is a wasteful number, since it uses less digits than its factorization.

23213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18192.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 23213001 is about 4817.9872353505. The cubic root of 23213001 is about 285.2618953045.

Adding to 23213001 its reverse (10031232), we get a palindrome (33244233).

The spelling of 23213001 in words is "twenty-three million, two hundred thirteen thousand, one".

Divisors: 1 3 7 21 61 183 427 1281 18121 54363 126847 380541 1105381 3316143 7737667 23213001