100555012215 has 48 divisors (see below), whose sum is σ = 203432905728. Its totient is φ = 44989956288.

The previous prime is 100555012171. The next prime is 100555012237. The reversal of 100555012215 is 512210555001.

100555012215 is a `hidden beast` number, since 100 + 5 + 550 + 1 + 2 + 2 + 1 + 5 = 666.

It is not a de Polignac number, because 100555012215 - 2¹² = 100555008119 is a prime.

It is a super-2 number, since 2×100555012215² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3381177 + ... + 3410786.

It is an arithmetic number, because the mean of its divisors is an integer number (4238185536).

Almost surely, 2^100555012215 is an apocalyptic number.

100555012215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100555012215 is an abundant number, since it is smaller than the sum of its proper divisors (102877893513).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100555012215 is a wasteful number, since it uses less digits than its factorization.

100555012215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6792028 (or 6792025 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

Adding to 100555012215 its reverse (512210555001), we get a palindrome (612765567216).

The spelling of 100555012215 in words is "one hundred billion, five hundred fifty-five million, twelve thousand, two hundred fifteen".