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31100322013 = 294722817551
BaseRepresentation
bin11100111101101110…
…010100000011011101
32222021102202001102021
4130331232110003131
51002143140301023
622142015500141
72150460242515
oct347556240335
988242661367
1031100322013
111220a359272
12603b527651
132c18329507
14171062c845
15c2052535d
hex73db940dd

31100322013 has 8 divisors (see below), whose sum is σ = 32857274880. Its totient is φ = 29389004400.

The previous prime is 31100321981. The next prime is 31100322031. The reversal of 31100322013 is 31022300113.

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 31100322013 - 25 = 31100321981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31100382013) 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, 11407413 + ... + 11410138.

It is an arithmetic number, because the mean of its divisors is an integer number (4107159360).

Almost surely, 231100322013 is an apocalyptic number.

It is an amenable number.

31100322013 is a deficient number, since it is larger than the sum of its proper divisors (1756952867).

31100322013 is a wasteful number, since it uses less digits than its factorization.

31100322013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22817627.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31100322013 its reverse (31022300113), we get a palindrome (62122622126).

The spelling of 31100322013 in words is "thirty-one billion, one hundred million, three hundred twenty-two thousand, thirteen".

Divisors: 1 29 47 1363 22817551 661708979 1072424897 31100322013