Search a number
-
+
21254799 = 322331771
BaseRepresentation
bin101000100010…
…1001010001111
31110222212002210
41101011022033
520420123144
62035321503
7345443226
oct121051217
943885083
1021254799
1110aa8055
127150293
134532607
142b73cbd
151cecab9
hex144528f

21254799 has 8 divisors (see below), whose sum is σ = 28467712. Its totient is φ = 14105880.

The previous prime is 21254797. The next prime is 21254813. The reversal of 21254799 is 99745212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21254799 - 21 = 21254797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21254797) 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, 15217 + ... + 16554.

It is an arithmetic number, because the mean of its divisors is an integer number (3558464).

Almost surely, 221254799 is an apocalyptic number.

21254799 is a deficient number, since it is larger than the sum of its proper divisors (7212913).

21254799 is a wasteful number, since it uses less digits than its factorization.

21254799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31997.

The product of its digits is 45360, while the sum is 39.

The square root of 21254799 is about 4610.2927238951. The cubic root of 21254799 is about 277.0037621075.

The spelling of 21254799 in words is "twenty-one million, two hundred fifty-four thousand, seven hundred ninety-nine".

Divisors: 1 3 223 669 31771 95313 7084933 21254799