5511520123 has 2 divisors, whose sum is σ = 5511520124. Its totient is φ = 5511520122.

The previous prime is 5511520117. The next prime is 5511520127. The reversal of 5511520123 is 3210251155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5511520123 is a prime.

It is not a weakly prime, because it can be changed into another prime (5511520127) 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 as a sum of consecutive naturals, namely, 2755760061 + 2755760062.

It is an arithmetic number, because the mean of its divisors is an integer number (2755760062).

Almost surely, 2^5511520123 is an apocalyptic number.

5511520123 is a deficient number, since it is larger than the sum of its proper divisors (1).

5511520123 is an equidigital number, since it uses as much as digits as its factorization.

5511520123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 5511520123 is about 74239.6128963507. The cubic root of 5511520123 is about 1766.4057338649.

Adding to 5511520123 its reverse (3210251155), we get a palindrome (8721771278).

The spelling of 5511520123 in words is "five billion, five hundred eleven million, five hundred twenty thousand, one hundred twenty-three".