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12222213 = 34074071
BaseRepresentation
bin101110100111…
…111100000101
3211222221201120
4232213330011
511112102323
61113544153
7205613163
oct56477405
924887646
1012222213
116998803
124115059
1326bc1a3
1418a2233
1511165e3
hexba7f05

12222213 has 4 divisors (see below), whose sum is σ = 16296288. Its totient is φ = 8148140.

The previous prime is 12222211. The next prime is 12222241. The reversal of 12222213 is 31222221.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 12222213 - 21 = 12222211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12222192 and 12222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222211) 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, 2037033 + ... + 2037038.

It is an arithmetic number, because the mean of its divisors is an integer number (4074072).

Almost surely, 212222213 is an apocalyptic number.

It is an amenable number.

12222213 is a deficient number, since it is larger than the sum of its proper divisors (4074075).

12222213 is an equidigital number, since it uses as much as digits as its factorization.

12222213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074074.

The product of its digits is 96, while the sum is 15.

The square root of 12222213 is about 3496.0281749437. The cubic root of 12222213 is about 230.3473830645.

Adding to 12222213 its reverse (31222221), we get a palindrome (43444434).

It can be divided in two parts, 1222221 and 3, that multiplied together give a palindrome (3666663).

The spelling of 12222213 in words is "twelve million, two hundred twenty-two thousand, two hundred thirteen".

Divisors: 1 3 4074071 12222213