1123105550 has 24 divisors (see below), whose sum is σ = 2387402256. Its totient is φ = 385064640.

The previous prime is 1123105547. The next prime is 1123105559. The reversal of 1123105550 is 555013211.

It is a happy number.

It is a super-2 number, since 2×1123105550² = 2522732152881605000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123105559) 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, 1604087 + ... + 1604786.

It is an arithmetic number, because the mean of its divisors is an integer number (99475094).

Almost surely, 2^1123105550 is an apocalyptic number.

1123105550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1123105550 is an abundant number, since it is smaller than the sum of its proper divisors (1264296706).

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

1123105550 is a wasteful number, since it uses less digits than its factorization.

1123105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208892 (or 3208887 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1123105550 is about 33512.7669702160. The cubic root of 1123105550 is about 1039.4577887392.

Adding to 1123105550 its reverse (555013211), we get a palindrome (1678118761).

The spelling of 1123105550 in words is "one billion, one hundred twenty-three million, one hundred five thousand, five hundred fifty".