100531500051550 has 48 divisors (see below), whose sum is σ = 195222707313120. Its totient is φ = 38443689123840.

The previous prime is 100531500051523. The next prime is 100531500051551. The reversal of 100531500051550 is 55150005135001.

It is a super-2 number, since 2×100531500051550² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100531500051551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21182595 + ... + 25490494.

It is an arithmetic number, because the mean of its divisors is an integer number (4067139735690).

Almost surely, 2^{100531500051550} is an apocalyptic number.

100531500051550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100531500051550 is a deficient number, since it is larger than the sum of its proper divisors (94691207261570).

100531500051550 is a wasteful number, since it uses less digits than its factorization.

100531500051550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46674997 (or 46674992 counting only the distinct ones).

The product of its (nonzero) digits is 9375, while the sum is 31.

Adding to 100531500051550 its reverse (55150005135001), we get a palindrome (155681505186551).

The spelling of 100531500051550 in words is "one hundred trillion, five hundred thirty-one billion, five hundred million, fifty-one thousand, five hundred fifty".