100105550 has 24 divisors (see below), whose sum is σ = 187159896. Its totient is φ = 39835040.

The previous prime is 100105549. The next prime is 100105567. The reversal of 100105550 is 55501001.

It is a super-2 number, since 2×100105550² = 20042242281605000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4769 + ... + 14931.

It is an arithmetic number, because the mean of its divisors is an integer number (7798329).

Almost surely, 2^100105550 is an apocalyptic number.

100105550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100105550 is a deficient number, since it is larger than the sum of its proper divisors (87054346).

100105550 is a wasteful number, since it uses less digits than its factorization.

100105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10372 (or 10367 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 100105550 is about 10005.2761081341. The cubic root of 100105550 is about 464.3221325054.

Adding to 100105550 its reverse (55501001), we get a palindrome (155606551).

The spelling of 100105550 in words is "one hundred million, one hundred five thousand, five hundred fifty".