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13200031 = 137912853
BaseRepresentation
bin110010010110…
…101010011111
3220211122001001
4302112222133
511334400111
61150531131
7220125025
oct62265237
926748031
1013200031
1174a6419
124506aa7
132972290
141a78715
15125b1c1
hexc96a9f

13200031 has 8 divisors (see below), whose sum is σ = 14396480. Its totient is φ = 12029472.

The previous prime is 13200001. The next prime is 13200101. The reversal of 13200031 is 13000231.

13200031 is digitally balanced in base 3, 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 13200031 - 211 = 13197983 is a prime.

It is a super-2 number, since 2×132000312 = 348481636801922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 13199990 and 13200017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13200001) 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, 5400 + ... + 7453.

It is an arithmetic number, because the mean of its divisors is an integer number (1799560).

Almost surely, 213200031 is an apocalyptic number.

13200031 is a deficient number, since it is larger than the sum of its proper divisors (1196449).

13200031 is a wasteful number, since it uses less digits than its factorization.

13200031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12945.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 13200031 is about 3633.1846911491. The cubic root of 13200031 is about 236.3333351016. Note that the first 5 decimals are identical.

Adding to 13200031 its reverse (13000231), we get a palindrome (26200262).

The spelling of 13200031 in words is "thirteen million, two hundred thousand, thirty-one".

Divisors: 1 13 79 1027 12853 167089 1015387 13200031