1123105554 has 32 divisors (see below), whose sum is σ = 2527392000.
Its totient is φ = 369628272.
The previous prime is 1123105547. The next prime is 1123105559. The reversal of 1123105554 is 4555013211.
1123105554 is a `hidden beast` number, since 1 + 1 + 2 + 3 + 105 + 554 = 666.
It is a super-2 number, since 2×11231055542 = 2522732170851293832, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 127369 + ... + 135900.
It is an arithmetic number, because the mean of its divisors is an integer number (78981000).
Almost surely, 21123105554 is an apocalyptic number.
1123105554 is an abundant number, since it is smaller than the sum of its proper divisors (1404286446).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1123105554 is a wasteful number, since it uses less digits than its factorization.
1123105554 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 263359 (or 263353 counting only the distinct ones).
The product of its (nonzero) digits is 3000, while the sum is 27.
The square root of 1123105554 is about 33512.7670298947.
The cubic root of 1123105554 is about 1039.4577899733.
Adding to 1123105554 its reverse (4555013211), we get a palindrome (5678118765).
The spelling of 1123105554 in words is "one billion, one hundred twenty-three million, one hundred five thousand, five hundred fifty-four".