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13220232 = 233550843
BaseRepresentation
bin110010011011…
…100110001000
3220212122202020
4302123212020
511341021412
61151204440
7220240644
oct62334610
926778666
1013220232
11750a613
124516720
13297b52c
141a81c24
15126218c
hexc9b988

13220232 has 16 divisors (see below), whose sum is σ = 33050640. Its totient is φ = 4406736.

The previous prime is 13220231. The next prime is 13220243. The reversal of 13220232 is 23202231.

Adding to 13220232 its reverse (23202231), we get a palindrome (36422463).

It is not an unprimeable number, because it can be changed into a prime (13220231) 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 3 ways as a sum of consecutive naturals, for example, 275398 + ... + 275445.

It is an arithmetic number, because the mean of its divisors is an integer number (2065665).

Almost surely, 213220232 is an apocalyptic number.

13220232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13220232 is an abundant number, since it is smaller than the sum of its proper divisors (19830408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13220232 is a wasteful number, since it uses less digits than its factorization.

13220232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550852 (or 550848 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 13220232 is about 3635.9636961884. The cubic root of 13220232 is about 236.4538332112.

The spelling of 13220232 in words is "thirteen million, two hundred twenty thousand, two hundred thirty-two".

Divisors: 1 2 3 4 6 8 12 24 550843 1101686 1652529 2203372 3305058 4406744 6610116 13220232