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2113230031 = 1131587701
BaseRepresentation
bin111110111110101…
…0101010011001111
312110021102012121221
41331331111103033
513311441330111
6545405504211
7103240105333
oct17575252317
95407365557
102113230031
11994955000
124ab872067
13278a70993
141609317c3
15c57cc371
hex7df554cf

2113230031 has 8 divisors (see below), whose sum is σ = 2324395728. Its totient is φ = 1921117000.

The previous prime is 2113230019. The next prime is 2113230079. The reversal of 2113230031 is 1300323112.

It is not a de Polignac number, because 2113230031 - 211 = 2113227983 is a prime.

It is a super-2 number, since 2×21132300312 = 8931482327840521922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2113229987 and 2113230014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113230001) 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, 792520 + ... + 795181.

It is an arithmetic number, because the mean of its divisors is an integer number (290549466).

Almost surely, 22113230031 is an apocalyptic number.

2113230031 is a deficient number, since it is larger than the sum of its proper divisors (211165697).

2113230031 is an equidigital number, since it uses as much as digits as its factorization.

2113230031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587734 (or 1587712 counting only the distinct ones).

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

The square root of 2113230031 is about 45969.8817814447. The cubic root of 2113230031 is about 1283.2627598379.

Adding to 2113230031 its reverse (1300323112), we get a palindrome (3413553143).

The spelling of 2113230031 in words is "two billion, one hundred thirteen million, two hundred thirty thousand, thirty-one".

Divisors: 1 11 121 1331 1587701 17464711 192111821 2113230031