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31112341 = 132393257
BaseRepresentation
bin111011010101…
…1110010010101
32011112200002221
41312223302111
530431043331
63030502341
7525310351
oct166536225
964480087
1031112341
1116620187
12a5049b1
1365a4390
1441bc461
152ae8711
hex1dabc95

31112341 has 4 divisors (see below), whose sum is σ = 33505612. Its totient is φ = 28719072.

The previous prime is 31112339. The next prime is 31112357. The reversal of 31112341 is 14321113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14321113 = 17382781.

It can be written as a sum of positive squares in 2 ways, for example, as 2114116 + 28998225 = 1454^2 + 5385^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112341 - 21 = 31112339 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 (31112311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1196616 + ... + 1196641.

It is an arithmetic number, because the mean of its divisors is an integer number (8376403).

Almost surely, 231112341 is an apocalyptic number.

It is an amenable number.

31112341 is a deficient number, since it is larger than the sum of its proper divisors (2393271).

31112341 is a wasteful number, since it uses less digits than its factorization.

31112341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393270.

The product of its digits is 72, while the sum is 16.

The square root of 31112341 is about 5577.8437590166. The cubic root of 31112341 is about 314.5170764232.

Adding to 31112341 its reverse (14321113), we get a palindrome (45433454).

The spelling of 31112341 in words is "thirty-one million, one hundred twelve thousand, three hundred forty-one".

Divisors: 1 13 2393257 31112341