105523221555 has 32 divisors (see below), whose sum is σ = 188539584000. Its totient is φ = 55996227936.

The previous prime is 105523221539. The next prime is 105523221571. The reversal of 105523221555 is 555122325501.

105523221555 is a `hidden beast` number, since 1 + 0 + 5 + 52 + 32 + 21 + 555 = 666.

It is an interprime number because it is at equal distance from previous prime (105523221539) and next prime (105523221571).

It is not a de Polignac number, because 105523221555 - 2⁴ = 105523221539 is a prime.

It is a super-2 number, since 2×105523221555² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1937089 + ... + 1990818.

It is an arithmetic number, because the mean of its divisors is an integer number (5891862000).

Almost surely, 2^105523221555 is an apocalyptic number.

105523221555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

105523221555 is a deficient number, since it is larger than the sum of its proper divisors (83016362445).

105523221555 is a wasteful number, since it uses less digits than its factorization.

105523221555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928120 (or 3928114 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 105523221555 in words is "one hundred five billion, five hundred twenty-three million, two hundred twenty-one thousand, five hundred fifty-five".