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2111231 is a prime number
BaseRepresentation
bin1000000011011011111111
310222021001202
420003123333
51020024411
6113130115
723642123
oct10033377
93867052
102111231
111212221
1285993b
1358bc65
143cd583
152ba83b
hex2036ff

2111231 has 2 divisors, whose sum is σ = 2111232. Its totient is φ = 2111230.

The previous prime is 2111189. The next prime is 2111251. The reversal of 2111231 is 1321112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111231 - 26 = 2111167 is a prime.

It is a super-2 number, since 2×21112312 = 8914592670722, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111251) 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, 1055615 + 1055616.

It is an arithmetic number, because the mean of its divisors is an integer number (1055616).

22111231 is an apocalyptic number.

2111231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111231 is an equidigital number, since it uses as much as digits as its factorization.

2111231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 11.

The square root of 2111231 is about 1453.0075705240. The cubic root of 2111231 is about 128.2857993783.

Adding to 2111231 its reverse (1321112), we get a palindrome (3432343).

The spelling of 2111231 in words is "two million, one hundred eleven thousand, two hundred thirty-one".