100555245 has 24 divisors (see below), whose sum is σ = 199195776. Its totient is φ = 45967968.

The previous prime is 100555243. The next prime is 100555249. The reversal of 100555245 is 542555001.

100555245 is a `hidden beast` number, since 100 + 5 + 552 + 4 + 5 = 666.

It is not a de Polignac number, because 100555245 - 2¹ = 100555243 is a prime.

It is a super-2 number, since 2×100555245² = 20222714594020050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100555243) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 159297 + ... + 159926.

It is an arithmetic number, because the mean of its divisors is an integer number (8299824).

Almost surely, 2^100555245 is an apocalyptic number.

100555245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100555245 is a deficient number, since it is larger than the sum of its proper divisors (98640531).

100555245 is a wasteful number, since it uses less digits than its factorization.

100555245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319241 (or 319238 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 100555245 is about 10027.7238194916. The cubic root of 100555245 is about 465.0163712585.

The spelling of 100555245 in words is "one hundred million, five hundred fifty-five thousand, two hundred forty-five".