5518387523 has 4 divisors (see below), whose sum is σ = 6020059128. Its totient is φ = 5016715920.

The previous prime is 5518387519. The next prime is 5518387529. The reversal of 5518387523 is 3257838155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5518387523 - 2² = 5518387519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5518387529) 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 3 ways as a sum of consecutive naturals, for example, 250835786 + ... + 250835807.

It is an arithmetic number, because the mean of its divisors is an integer number (1505014782).

Almost surely, 2^5518387523 is an apocalyptic number.

5518387523 is a deficient number, since it is larger than the sum of its proper divisors (501671605).

5518387523 is a wasteful number, since it uses less digits than its factorization.

5518387523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501671604.

The product of its digits is 1008000, while the sum is 47.

The square root of 5518387523 is about 74285.8500860022. The cubic root of 5518387523 is about 1767.1390814513.

The spelling of 5518387523 in words is "five billion, five hundred eighteen million, three hundred eighty-seven thousand, five hundred twenty-three".