11531310242 has 8 divisors (see below), whose sum is σ = 17533910316. Its totient is φ = 5686673472.

The previous prime is 11531310179. The next prime is 11531310247. The reversal of 11531310242 is 24201313511.

11531310242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10859515681 + 671794561 = 104209^2 + 25919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×11531310242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11531310247) 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, 39490643 + ... + 39490934.

Almost surely, 2^11531310242 is an apocalyptic number.

11531310242 is a deficient number, since it is larger than the sum of its proper divisors (6002600074).

11531310242 is an equidigital number, since it uses as much as digits as its factorization.

11531310242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78981652.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 11531310242 its reverse (24201313511), we get a palindrome (35732623753).

The spelling of 11531310242 in words is "eleven billion, five hundred thirty-one million, three hundred ten thousand, two hundred forty-two".