105551321559 has 8 divisors (see below), whose sum is σ = 140969266032. Its totient is φ = 70250462400.

The previous prime is 105551321537. The next prime is 105551321581. The reversal of 105551321559 is 955123155501.

It is an interprime number because it is at equal distance from previous prime (105551321537) and next prime (105551321581).

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

It is not a de Polignac number, because 105551321559 - 2²³ = 105542932951 is a prime.

It is a super-2 number, since 2×105551321559² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 105551321559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105551325559) 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, 29269224 + ... + 29272829.

It is an arithmetic number, because the mean of its divisors is an integer number (17621158254).

Almost surely, 2^105551321559 is an apocalyptic number.

105551321559 is a deficient number, since it is larger than the sum of its proper divisors (35417944473).

105551321559 is an equidigital number, since it uses as much as digits as its factorization.

105551321559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58542657.

The product of its (nonzero) digits is 168750, while the sum is 42.

The spelling of 105551321559 in words is "one hundred five billion, five hundred fifty-one million, three hundred twenty-one thousand, five hundred fifty-nine".