Search a number
12321213 = 318122691
BaseRepresentation
bin101111000000…
…000110111101
3212011222112020
4233000012331
511123234323
61120030353
7206504622
oct57000675
925158466
1012321213
116a56123
1241623b9
132725278
1418ca349
151135ae3
hexbc01bd

12321213 has 8 divisors (see below), whose sum is σ = 16519776. Its totient is φ = 8168400.

The previous prime is 12321193. The next prime is 12321223. The reversal of 12321213 is 31212321.

12321213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12321213 - 26 = 12321149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12321192 and 12321201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10803 + ... + 11888.

It is an arithmetic number, because the mean of its divisors is an integer number (2064972).

Almost surely, 212321213 is an apocalyptic number.

It is an amenable number.

12321213 is a deficient number, since it is larger than the sum of its proper divisors (4198563).

12321213 is a wasteful number, since it uses less digits than its factorization.

12321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22875.

The product of its digits is 72, while the sum is 15.

The square root of 12321213 is about 3510.1585434279. The cubic root of 12321213 is about 230.9676497491.

Adding to 12321213 its reverse (31212321), we get a palindrome (43533534).

The spelling of 12321213 in words is "twelve million, three hundred twenty-one thousand, two hundred thirteen".

Divisors: 1 3 181 543 22691 68073 4107071 12321213