105551321603 has 16 divisors (see below), whose sum is σ = 129967642560. Its totient is φ = 83475639936.

The previous prime is 105551321591. The next prime is 105551321621. The reversal of 105551321603 is 306123155501.

It is not a de Polignac number, because 105551321603 - 2¹⁶ = 105551256067 is a prime.

It is a super-2 number, since 2×105551321603² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105551321603.

It is not an unprimeable number, because it can be changed into a prime (105551321683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55688 + ... + 462821.

It is an arithmetic number, because the mean of its divisors is an integer number (8122977660).

Almost surely, 2^105551321603 is an apocalyptic number.

105551321603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

105551321603 is a deficient number, since it is larger than the sum of its proper divisors (24416320957).

105551321603 is a wasteful number, since it uses less digits than its factorization.

105551321603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520766.

The product of its (nonzero) digits is 13500, while the sum is 32.

The spelling of 105551321603 in words is "one hundred five billion, five hundred fifty-one million, three hundred twenty-one thousand, six hundred three".