105542235581 has 2 divisors, whose sum is σ = 105542235582. Its totient is φ = 105542235580.

The previous prime is 105542235551. The next prime is 105542235593. The reversal of 105542235581 is 185532245501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97615004356 + 7927231225 = 312434^2 + 89035^2 .

It is a cyclic number.

It is not a de Polignac number, because 105542235581 - 2¹⁰ = 105542234557 is a prime.

It is a super-2 number, since 2×105542235581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105542235511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52771117790 + 52771117791.

It is an arithmetic number, because the mean of its divisors is an integer number (52771117791).

Almost surely, 2^105542235581 is an apocalyptic number.

It is an amenable number.

105542235581 is a deficient number, since it is larger than the sum of its proper divisors (1).

105542235581 is an equidigital number, since it uses as much as digits as its factorization.

105542235581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240000, while the sum is 41.

The spelling of 105542235581 in words is "one hundred five billion, five hundred forty-two million, two hundred thirty-five thousand, five hundred eighty-one".