105506723522 has 6 divisors (see below), whose sum is σ = 158260774329. Its totient is φ = 52753132080.

The previous prime is 105506723521. The next prime is 105506723537. The reversal of 105506723522 is 225327605501.

It can be written as a sum of positive squares in 2 ways, for example, as 96502801201 + 9003922321 = 310649^2 + 94889^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=229681.

It is a super-2 number, since 2×105506723522² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105506723521) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 344522 + ... + 574202.

Almost surely, 2^105506723522 is an apocalyptic number.

105506723522 is a deficient number, since it is larger than the sum of its proper divisors (52754050807).

105506723522 is an frugal number, since it uses more digits than its factorization.

105506723522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459364 (or 229683 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 38.

The spelling of 105506723522 in words is "one hundred five billion, five hundred six million, seven hundred twenty-three thousand, five hundred twenty-two".