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23406213 = 39837937
BaseRepresentation
bin101100101001…
…0011010000101
31122001011021210
41121102122011
521442444323
62153402033
7402643455
oct131223205
948034253
1023406213
1112237486
127a09319
134b0693c
143173d65
1520c5293
hex1652685

23406213 has 8 divisors (see below), whose sum is σ = 31243968. Its totient is φ = 15586304.

The previous prime is 23406193. The next prime is 23406221. The reversal of 23406213 is 31260432.

It is a happy number.

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 23406213 - 221 = 21309061 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23406213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23406283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020 + ... + 6917.

It is an arithmetic number, because the mean of its divisors is an integer number (3905496).

Almost surely, 223406213 is an apocalyptic number.

It is an amenable number.

23406213 is a deficient number, since it is larger than the sum of its proper divisors (7837755).

23406213 is an equidigital number, since it uses as much as digits as its factorization.

23406213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8923.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 23406213 is about 4837.9967961957. The cubic root of 23406213 is about 286.0511628683.

Adding to 23406213 its reverse (31260432), we get a palindrome (54666645).

The spelling of 23406213 in words is "twenty-three million, four hundred six thousand, two hundred thirteen".

Divisors: 1 3 983 2949 7937 23811 7802071 23406213