1123100550 has 288 divisors, whose sum is σ = 3665765376. Its totient is φ = 242784000.

The previous prime is 1123100533. The next prime is 1123100593. The reversal of 1123100550 is 550013211.

1123100550 is a `hidden beast` number, since 1 + 12 + 3 + 100 + 550 = 666.

It is a super-2 number, since 2×1123100550² = 2522709690820605000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1994569 + ... + 1995131.

It is an arithmetic number, because the mean of its divisors is an integer number (12728352).

Almost surely, 2^1123100550 is an apocalyptic number.

1123100550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123100550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1832882688).

1123100550 is an abundant number, since it is smaller than the sum of its proper divisors (2542664826).

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

1123100550 is a wasteful number, since it uses less digits than its factorization.

1123100550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1123100550 is about 33512.6923716970. The cubic root of 1123100550 is about 1039.4562462019.

Adding to 1123100550 its reverse (550013211), we get a palindrome (1673113761).

The spelling of 1123100550 in words is "one billion, one hundred twenty-three million, one hundred thousand, five hundred fifty".