1103123551 has 2 divisors, whose sum is σ = 1103123552. Its totient is φ = 1103123550.

The previous prime is 1103123501. The next prime is 1103123569. The reversal of 1103123551 is 1553213011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1103123551 - 2⁷ = 1103123423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103123501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551561775 + 551561776.

It is an arithmetic number, because the mean of its divisors is an integer number (551561776).

Almost surely, 2^1103123551 is an apocalyptic number.

1103123551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103123551 is an equidigital number, since it uses as much as digits as its factorization.

1103123551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 1103123551 is about 33213.3038254251. The cubic root of 1103123551 is about 1033.2562767953.

Adding to 1103123551 its reverse (1553213011), we get a palindrome (2656336562).

The spelling of 1103123551 in words is "one billion, one hundred three million, one hundred twenty-three thousand, five hundred fifty-one".