5518700521 has 2 divisors, whose sum is σ = 5518700522. Its totient is φ = 5518700520.

The previous prime is 5518700513. The next prime is 5518700543. The reversal of 5518700521 is 1250078155.

5518700521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3450270121 + 2068430400 = 58739^2 + 45480^2 .

It is a cyclic number.

It is not a de Polignac number, because 5518700521 - 2³ = 5518700513 is a prime.

It is not a weakly prime, because it can be changed into another prime (5518700221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2759350260 + 2759350261.

It is an arithmetic number, because the mean of its divisors is an integer number (2759350261).

Almost surely, 2^5518700521 is an apocalyptic number.

It is an amenable number.

5518700521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5518700521 is an equidigital number, since it uses as much as digits as its factorization.

5518700521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 34.

The square root of 5518700521 is about 74287.9567695868. The cubic root of 5518700521 is about 1767.1724910019.

Adding to 5518700521 its reverse (1250078155), we get a palindrome (6768778676).

The spelling of 5518700521 in words is "five billion, five hundred eighteen million, seven hundred thousand, five hundred twenty-one".