5555505521 has 8 divisors (see below), whose sum is σ = 5668566504. Its totient is φ = 5443153920.

The previous prime is 5555505511. The next prime is 5555505533. The reversal of 5555505521 is 1255055555.

It can be written as a sum of positive squares in 4 ways, for example, as 428945521 + 5126560000 = 20711^2 + 71600^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5555505521 - 2⁶ = 5555505457 is a prime.

It is a super-2 number, since 2×5555505521² = 61727283187722962882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5555505511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161510 + ... + 192863.

It is an arithmetic number, because the mean of its divisors is an integer number (708570813).

Almost surely, 2^5555505521 is an apocalyptic number.

It is an amenable number.

5555505521 is a deficient number, since it is larger than the sum of its proper divisors (113060983).

5555505521 is a wasteful number, since it uses less digits than its factorization.

5555505521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354691.

The product of its (nonzero) digits is 156250, while the sum is 38.

The square root of 5555505521 is about 74535.2636072349. The cubic root of 5555505521 is about 1771.0922983235.

The spelling of 5555505521 in words is "five billion, five hundred fifty-five million, five hundred five thousand, five hundred twenty-one".