1123453551 has 32 divisors (see below), whose sum is σ = 1733799168. Its totient is φ = 639511040.

The previous prime is 1123453543. The next prime is 1123453559. The reversal of 1123453551 is 1553543211.

It is an interprime number because it is at equal distance from previous prime (1123453543) and next prime (1123453559).

It is a cyclic number.

It is not a de Polignac number, because 1123453551 - 2³ = 1123453543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123453559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314065 + ... + 317621.

It is an arithmetic number, because the mean of its divisors is an integer number (54181224).

Almost surely, 2^1123453551 is an apocalyptic number.

1123453551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1123453551 is a deficient number, since it is larger than the sum of its proper divisors (610345617).

1123453551 is a wasteful number, since it uses less digits than its factorization.

1123453551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151.

The product of its digits is 9000, while the sum is 30.

The square root of 1123453551 is about 33517.9586341412. The cubic root of 1123453551 is about 1039.5651383986.

Adding to 1123453551 its reverse (1553543211), we get a palindrome (2676996762).

The spelling of 1123453551 in words is "one billion, one hundred twenty-three million, four hundred fifty-three thousand, five hundred fifty-one".