11427147731 has 4 divisors (see below), whose sum is σ = 11430594000. Its totient is φ = 11423701464.

The previous prime is 11427147701. The next prime is 11427147749. The reversal of 11427147731 is 13774172411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11427147731 is a prime.

It is a super-2 number, since 2×11427147731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11427147701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1718156 + ... + 1724793.

It is an arithmetic number, because the mean of its divisors is an integer number (2857648500).

Almost surely, 2^11427147731 is an apocalyptic number.

11427147731 is a deficient number, since it is larger than the sum of its proper divisors (3446269).

11427147731 is an equidigital number, since it uses as much as digits as its factorization.

11427147731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446268.

The product of its digits is 32928, while the sum is 38.

The spelling of 11427147731 in words is "eleven billion, four hundred twenty-seven million, one hundred forty-seven thousand, seven hundred thirty-one".