11131550 has 24 divisors (see below), whose sum is σ = 20879616. Its totient is φ = 4415040.

The previous prime is 11131543. The next prime is 11131553. The reversal of 11131550 is 5513111.

It is a super-2 number, since 2×11131550² = 247822810805000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5474 + ... + 7226.

It is an arithmetic number, because the mean of its divisors is an integer number (869984).

Almost surely, 2^11131550 is an apocalyptic number.

11131550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11131550 is a deficient number, since it is larger than the sum of its proper divisors (9748066).

11131550 is a wasteful number, since it uses less digits than its factorization.

11131550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892 (or 1887 counting only the distinct ones).

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

The square root of 11131550 is about 3336.3977580618. The cubic root of 11131550 is about 223.2810575402.

Adding to 11131550 its reverse (5513111), we get a palindrome (16644661).

The spelling of 11131550 in words is "eleven million, one hundred thirty-one thousand, five hundred fifty".