11315131542 has 320 divisors, whose sum is σ = 31405296384. Its totient is φ = 2998114560.

The previous prime is 11315131523. The next prime is 11315131547. The reversal of 11315131542 is 24513151311.

11315131542 is a `hidden beast` number, since 1 + 131 + 513 + 15 + 4 + 2 = 666.

11315131542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11315131547) 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 159 ways as a sum of consecutive naturals, for example, 36856953 + ... + 36857259.

Almost surely, 2^11315131542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11315131542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15702648192).

11315131542 is an abundant number, since it is smaller than the sum of its proper divisors (20090164842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11315131542 is a wasteful number, since it uses less digits than its factorization.

11315131542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 416 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

Adding to 11315131542 its reverse (24513151311), we get a palindrome (35828282853).

The spelling of 11315131542 in words is "eleven billion, three hundred fifteen million, one hundred thirty-one thousand, five hundred forty-two".