1105505521 has 2 divisors, whose sum is σ = 1105505522. Its totient is φ = 1105505520.

The previous prime is 1105505473. The next prime is 1105505543. The reversal of 1105505521 is 1255055011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994519296 + 110986225 = 31536^2 + 10535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105505521 - 2¹⁷ = 1105374449 is a prime.

It is a super-2 number, since 2×1105505521² = 2444284913922962882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1105505581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552752760 + 552752761.

It is an arithmetic number, because the mean of its divisors is an integer number (552752761).

Almost surely, 2^1105505521 is an apocalyptic number.

It is an amenable number.

1105505521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105505521 is an equidigital number, since it uses as much as digits as its factorization.

1105505521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 1105505521 is about 33249.1431618922. The cubic root of 1105505521 is about 1033.9994441095. Note that the first 3 decimals are identical.

The spelling of 1105505521 in words is "one billion, one hundred five million, five hundred five thousand, five hundred twenty-one".