5505551021 has 2 divisors, whose sum is σ = 5505551022. Its totient is φ = 5505551020.

The previous prime is 5505550993. The next prime is 5505551027. The reversal of 5505551021 is 1201555055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5480440900 + 25110121 = 74030^2 + 5011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5505551021 is a prime.

It is a super-2 number, since 2×5505551021² = 60622184089668284882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5505551027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752775510 + 2752775511.

It is an arithmetic number, because the mean of its divisors is an integer number (2752775511).

Almost surely, 2^5505551021 is an apocalyptic number.

It is an amenable number.

5505551021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505551021 is an equidigital number, since it uses as much as digits as its factorization.

5505551021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 5505551021 is about 74199.4004086286. The cubic root of 5505551021 is about 1765.7678176175.

The spelling of 5505551021 in words is "five billion, five hundred five million, five hundred fifty-one thousand, twenty-one".