105550353521 has 2 divisors, whose sum is σ = 105550353522. Its totient is φ = 105550353520.

The previous prime is 105550353499. The next prime is 105550353563. The reversal of 105550353521 is 125353055501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88970958400 + 16579395121 = 298280^2 + 128761^2 .

It is an emirp because it is prime and its reverse (125353055501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105550353521 - 2¹⁰ = 105550352497 is a prime.

It is a super-2 number, since 2×105550353521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105550353221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52775176760 + 52775176761.

It is an arithmetic number, because the mean of its divisors is an integer number (52775176761).

Almost surely, 2^105550353521 is an apocalyptic number.

It is an amenable number.

105550353521 is a deficient number, since it is larger than the sum of its proper divisors (1).

105550353521 is an equidigital number, since it uses as much as digits as its factorization.

105550353521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56250, while the sum is 35.

The spelling of 105550353521 in words is "one hundred five billion, five hundred fifty million, three hundred fifty-three thousand, five hundred twenty-one".