11431571 has 2 divisors, whose sum is σ = 11431572. Its totient is φ = 11431570.

The previous prime is 11431561. The next prime is 11431573. The reversal of 11431571 is 17513411.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (17513411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11431571 - 2¹⁰ = 11430547 is a prime.

Together with 11431573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11431573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715785 + 5715786.

It is an arithmetic number, because the mean of its divisors is an integer number (5715786).

Almost surely, 2^11431571 is an apocalyptic number.

11431571 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431571 is an equidigital number, since it uses as much as digits as its factorization.

11431571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 23.

The square root of 11431571 is about 3381.0606324052. The cubic root of 11431571 is about 225.2692808872.

Adding to 11431571 its reverse (17513411), we get a palindrome (28944982).

The spelling of 11431571 in words is "eleven million, four hundred thirty-one thousand, five hundred seventy-one".