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13000000231 = 52325579721
BaseRepresentation
bin11000001101101110…
…00100001011100111
31020112222210102210001
430012313010023213
5203111000001411
65545551042131
7640103115211
oct140667041347
936488712701
1013000000231
115571185649
122629810347
1312c23a1b3a
148b47695b1
15511451dc1
hex306dc42e7

13000000231 has 8 divisors (see below), whose sum is σ = 13031291024. Its totient is φ = 12968735040.

The previous prime is 13000000229. The next prime is 13000000261. The reversal of 13000000231 is 13200000031.

13000000231 is digitally balanced in base 2, 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 a cyclic number.

It is not a de Polignac number, because 13000000231 - 21 = 13000000229 is a prime.

It is a super-2 number, since 2×130000002312 (a number of 21 digits) 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 (13000000261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332451 + ... + 1342171.

It is an arithmetic number, because the mean of its divisors is an integer number (1628911378).

Almost surely, 213000000231 is an apocalyptic number.

13000000231 is a deficient number, since it is larger than the sum of its proper divisors (31290793).

13000000231 is an equidigital number, since it uses as much as digits as its factorization.

13000000231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12801.

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

Adding to 13000000231 its reverse (13200000031), we get a palindrome (26200000262).

The spelling of 13000000231 in words is "thirteen billion, two hundred thirty-one", and thus it is an aban number.

Divisors: 1 523 2557 9721 1337311 5084083 24856597 13000000231