11131052550 has 48 divisors (see below), whose sum is σ = 27640379712. Its totient is φ = 2964477600.

The previous prime is 11131052539. The next prime is 11131052551. The reversal of 11131052550 is 5525013111.

It is a self number, because there is not a number n which added to its sum of digits gives 11131052550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131052551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70905 + ... + 165195.

It is an arithmetic number, because the mean of its divisors is an integer number (575841244).

Almost surely, 2^11131052550 is an apocalyptic number.

11131052550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11131052550 is an abundant number, since it is smaller than the sum of its proper divisors (16509327162).

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

11131052550 is a wasteful number, since it uses less digits than its factorization.

11131052550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95093 (or 95088 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

Adding to 11131052550 its reverse (5525013111), we get a palindrome (16656065661).

The spelling of 11131052550 in words is "eleven billion, one hundred thirty-one million, fifty-two thousand, five hundred fifty".