2011231447 has 2 divisors, whose sum is σ = 2011231448. Its totient is φ = 2011231446.

The previous prime is 2011231433. The next prime is 2011231463. The reversal of 2011231447 is 7441321102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2011231447 - 2¹¹ = 2011229399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011231477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005615723 + 1005615724.

It is an arithmetic number, because the mean of its divisors is an integer number (1005615724).

Almost surely, 2^2011231447 is an apocalyptic number.

2011231447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011231447 is an equidigital number, since it uses as much as digits as its factorization.

2011231447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 2011231447 is about 44846.7551446033. The cubic root of 2011231447 is about 1262.2751048873.

Adding to 2011231447 its reverse (7441321102), we get a palindrome (9452552549).

The spelling of 2011231447 in words is "two billion, eleven million, two hundred thirty-one thousand, four hundred forty-seven".