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13012231 is a prime number
BaseRepresentation
bin110001101000…
…110100000111
3220111002102111
4301220310013
511312342411
61142521451
7215413351
oct61506407
926432374
1013012231
117388311
124436287
13290795b
141a2a0d1
151220721
hexc68d07

13012231 has 2 divisors, whose sum is σ = 13012232. Its totient is φ = 13012230.

The previous prime is 13012229. The next prime is 13012243. The reversal of 13012231 is 13221031.

It is a weak prime.

It is an emirp because it is prime and its reverse (13221031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13012231 - 21 = 13012229 is a prime.

It is a super-2 number, since 2×130122312 = 338636311194722, which contains 22 as substring.

Together with 13012229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13012261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6506115 + 6506116.

It is an arithmetic number, because the mean of its divisors is an integer number (6506116).

Almost surely, 213012231 is an apocalyptic number.

13012231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13012231 is an equidigital number, since it uses as much as digits as its factorization.

13012231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 13012231 is about 3607.2470112262. The cubic root of 13012231 is about 235.2071871309.

Adding to 13012231 its reverse (13221031), we get a palindrome (26233262).

The spelling of 13012231 in words is "thirteen million, twelve thousand, two hundred thirty-one".