11251568731 has 4 divisors (see below), whose sum is σ = 12117074032. Its totient is φ = 10386063432.

The previous prime is 11251568707. The next prime is 11251568747. The reversal of 11251568731 is 13786515211.

11251568731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11251568731 - 2²¹ = 11249471579 is a prime.

It is a super-2 number, since 2×11251568731² (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 (11251568701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432752631 + ... + 432752656.

It is an arithmetic number, because the mean of its divisors is an integer number (3029268508).

Almost surely, 2^11251568731 is an apocalyptic number.

11251568731 is a deficient number, since it is larger than the sum of its proper divisors (865505301).

11251568731 is an equidigital number, since it uses as much as digits as its factorization.

11251568731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865505300.

The product of its digits is 50400, while the sum is 40.

The spelling of 11251568731 in words is "eleven billion, two hundred fifty-one million, five hundred sixty-eight thousand, seven hundred thirty-one".