103554451521 has 12 divisors (see below), whose sum is σ = 149581553940. Its totient is φ = 69034961760.

The previous prime is 103554451493. The next prime is 103554451547. The reversal of 103554451521 is 125154455301.

103554451521 is a `hidden beast` number, since 1 + 0 + 3 + 554 + 4 + 51 + 52 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37628240400 + 65926211121 = 193980^2 + 256761^2 .

It is not a de Polignac number, because 103554451521 - 2⁹ = 103554451009 is a prime.

It is a super-3 number, since 3×103554451521³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (103554456521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655891 + ... + 798311.

It is an arithmetic number, because the mean of its divisors is an integer number (12465129495).

Almost surely, 2^103554451521 is an apocalyptic number.

It is an amenable number.

103554451521 is a deficient number, since it is larger than the sum of its proper divisors (46027102419).

103554451521 is a wasteful number, since it uses less digits than its factorization.

103554451521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223216 (or 223213 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 36.

The spelling of 103554451521 in words is "one hundred three billion, five hundred fifty-four million, four hundred fifty-one thousand, five hundred twenty-one".