11531055320 has 32 divisors (see below), whose sum is σ = 25950244320. Its totient is φ = 4611467520.

The previous prime is 11531055299. The next prime is 11531055343. The reversal of 11531055320 is 2355013511.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11531055320.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 184940 + ... + 239300.

It is an arithmetic number, because the mean of its divisors is an integer number (810945135).

Almost surely, 2^11531055320 is an apocalyptic number.

11531055320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11531055320 is an abundant number, since it is smaller than the sum of its proper divisors (14419189000).

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

11531055320 is a wasteful number, since it uses less digits than its factorization.

11531055320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59675 (or 59671 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 26.

Adding to 11531055320 its reverse (2355013511), we get a palindrome (13886068831).

The spelling of 11531055320 in words is "eleven billion, five hundred thirty-one million, fifty-five thousand, three hundred twenty".