11131550000 has 120 divisors (see below), whose sum is σ = 27185260032. Its totient is φ = 4415040000.

The previous prime is 11131549993. The next prime is 11131550039. The reversal of 11131550000 is 5513111.

It is a super-2 number, since 2×11131550000² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6349124 + ... + 6350876.

Almost surely, 2^11131550000 is an apocalyptic number.

11131550000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11131550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13592630016).

11131550000 is an abundant number, since it is smaller than the sum of its proper divisors (16053710032).

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

11131550000 is an equidigital number, since it uses as much as digits as its factorization.

11131550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 17.

The spelling of 11131550000 in words is "eleven billion, one hundred thirty-one million, five hundred fifty thousand".