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31102000013 = 731143327189
BaseRepresentation
bin11100111101110100…
…101101101110001101
32222021112220022012102
4130331310231232031
51002144103000023
622142115444445
72150510431610
oct347564555615
988245808172
1031102000013
11122102a4a47
12603bbb6725
132c18796206
141710948177
15c20757628
hex73dd2db8d

31102000013 has 8 divisors (see below), whose sum is σ = 36691760640. Its totient is φ = 25798893840.

The previous prime is 31101999997. The next prime is 31102000019. The reversal of 31102000013 is 31000020113.

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 31102000013 - 24 = 31101999997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31101999958 and 31102000003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102000019) 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, 71663378 + ... + 71663811.

It is an arithmetic number, because the mean of its divisors is an integer number (4586470080).

Almost surely, 231102000013 is an apocalyptic number.

It is an amenable number.

31102000013 is a deficient number, since it is larger than the sum of its proper divisors (5589760627).

31102000013 is a wasteful number, since it uses less digits than its factorization.

31102000013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143327227.

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

Adding to 31102000013 its reverse (31000020113), we get a palindrome (62102020126).

The spelling of 31102000013 in words is "thirty-one billion, one hundred two million, thirteen", and thus it is an aban number.

Divisors: 1 7 31 217 143327189 1003290323 4443142859 31102000013