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12213103 = 72281887
BaseRepresentation
bin101110100101…
…101101101111
3211222111020011
4232211231233
511111304403
61113434051
7205544500
oct56455557
924874204
1012213103
116991981
12410b927
1326b7cb6
14189cba7
151113a6d
hexba5b6f

12213103 has 12 divisors (see below), whose sum is σ = 14273712. Its totient is φ = 10419360.

The previous prime is 12213079. The next prime is 12213109. The reversal of 12213103 is 30131221.

It is a de Polignac number, because none of the positive numbers 2k-12213103 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 (12213109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13326 + ... + 14212.

It is an arithmetic number, because the mean of its divisors is an integer number (1189476).

Almost surely, 212213103 is an apocalyptic number.

12213103 is a deficient number, since it is larger than the sum of its proper divisors (2060609).

12213103 is an equidigital number, since it uses as much as digits as its factorization.

12213103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 1175 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12213103 is about 3494.7250249483. The cubic root of 12213103 is about 230.2901379418.

Adding to 12213103 its reverse (30131221), we get a palindrome (42344324).

It can be divided in two parts, 122 and 13103, that added together give a square (13225 = 1152).

The spelling of 12213103 in words is "twelve million, two hundred thirteen thousand, one hundred three".

Divisors: 1 7 49 281 887 1967 6209 13769 43463 249247 1744729 12213103