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13201031 = 471571789
BaseRepresentation
bin110010010110…
…111010000111
3220211200102002
4302112322013
511334413111
61150535515
7220130654
oct62267207
926750362
1013201031
1174a7148
12450759b
13297287c
141a78c2b
15125b63b
hexc96e87

13201031 has 8 divisors (see below), whose sum is σ = 13575360. Its totient is φ = 12830688.

The previous prime is 13200997. The next prime is 13201033. The reversal of 13201031 is 13010231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13201031 is a prime.

It is a super-2 number, since 2×132010312 = 348534438925922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13201033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6485 + ... + 8273.

It is an arithmetic number, because the mean of its divisors is an integer number (1696920).

Almost surely, 213201031 is an apocalyptic number.

13201031 is a deficient number, since it is larger than the sum of its proper divisors (374329).

13201031 is a wasteful number, since it uses less digits than its factorization.

13201031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 13201031 is about 3633.3223088518. The cubic root of 13201031 is about 236.3393029504.

Adding to 13201031 its reverse (13010231), we get a palindrome (26211262).

The spelling of 13201031 in words is "thirteen million, two hundred one thousand, thirty-one".

Divisors: 1 47 157 1789 7379 84083 280873 13201031