11731442071 has 4 divisors (see below), whose sum is σ = 11733449544. Its totient is φ = 11729434600.

The previous prime is 11731442069. The next prime is 11731442089. The reversal of 11731442071 is 17024413711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11731442071 - 2¹ = 11731442069 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11731442011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994945 + ... + 1006666.

It is an arithmetic number, because the mean of its divisors is an integer number (2933362386).

Almost surely, 2^11731442071 is an apocalyptic number.

11731442071 is a deficient number, since it is larger than the sum of its proper divisors (2007473).

11731442071 is an equidigital number, since it uses as much as digits as its factorization.

11731442071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007472.

The product of its (nonzero) digits is 4704, while the sum is 31.

Adding to 11731442071 its reverse (17024413711), we get a palindrome (28755855782).

The spelling of 11731442071 in words is "eleven billion, seven hundred thirty-one million, four hundred forty-two thousand, seventy-one".