11311444471 has 2 divisors, whose sum is σ = 11311444472. Its totient is φ = 11311444470.

The previous prime is 11311444427. The next prime is 11311444481. The reversal of 11311444471 is 17444411311.

It is a strong prime.

It is an emirp because it is prime and its reverse (17444411311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11311444471 is a prime.

It is a super-3 number, since 3×11311444471³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11311444481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5655722235 + 5655722236.

It is an arithmetic number, because the mean of its divisors is an integer number (5655722236).

Almost surely, 2^11311444471 is an apocalyptic number.

11311444471 is a deficient number, since it is larger than the sum of its proper divisors (1).

11311444471 is an equidigital number, since it uses as much as digits as its factorization.

11311444471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

Adding to 11311444471 its reverse (17444411311), we get a palindrome (28755855782).

The spelling of 11311444471 in words is "eleven billion, three hundred eleven million, four hundred forty-four thousand, four hundred seventy-one".