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11111131 is a prime number
BaseRepresentation
bin101010011000…
…101011011011
3202220111121101
4222120223123
510321024011
61034052231
7163304653
oct52305333
922814541
1011111131
1162a9a59
12387a077
1323c0545
141693363
15e972c1
hexa98adb

11111131 has 2 divisors, whose sum is σ = 11111132. Its totient is φ = 11111130.

The previous prime is 11111119. The next prime is 11111141. The reversal of 11111131 is 13111111.

It is an a-pointer prime, because the next prime (11111141) can be obtained adding 11111131 to its sum of digits (10).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111131 - 25 = 11111099 is a prime.

It is a super-2 number, since 2×111111312 = 246914464198322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11111101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555565 + 5555566.

It is an arithmetic number, because the mean of its divisors is an integer number (5555566).

Almost surely, 211111131 is an apocalyptic number.

11111131 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111131 is an equidigital number, since it uses as much as digits as its factorization.

11111131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3, while the sum is 10.

The square root of 11111131 is about 3333.3363166653. The cubic root of 11111131 is about 223.1444498368.

Adding to 11111131 its reverse (13111111), we get a palindrome (24222242).

It can be divided in two parts, 11111 and 131, that multiplied together give a palindrome (1455541).

The spelling of 11111131 in words is "eleven million, one hundred eleven thousand, one hundred thirty-one".