5505541721 has 2 divisors, whose sum is σ = 5505541722. Its totient is φ = 5505541720.

The previous prime is 5505541709. The next prime is 5505541771. The reversal of 5505541721 is 1271455055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3414766096 + 2090775625 = 58436^2 + 45725^2 .

It is a cyclic number.

It is not a de Polignac number, because 5505541721 - 2²² = 5501347417 is a prime.

It is not a weakly prime, because it can be changed into another prime (5505541771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752770860 + 2752770861.

It is an arithmetic number, because the mean of its divisors is an integer number (2752770861).

Almost surely, 2^5505541721 is an apocalyptic number.

It is an amenable number.

5505541721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505541721 is an equidigital number, since it uses as much as digits as its factorization.

5505541721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35000, while the sum is 35.

The square root of 5505541721 is about 74199.3377396322. The cubic root of 5505541721 is about 1765.7668233695.

Adding to 5505541721 its reverse (1271455055), we get a palindrome (6776996776).

The spelling of 5505541721 in words is "five billion, five hundred five million, five hundred forty-one thousand, seven hundred twenty-one".