100555331551 has 16 divisors (see below), whose sum is σ = 111147263424. Its totient is φ = 90486595584.

The previous prime is 100555331521. The next prime is 100555331557. The reversal of 100555331551 is 155133555001.

It is not a de Polignac number, because 100555331551 - 2⁵ = 100555331519 is a prime.

It is a super-2 number, since 2×100555331551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100555331557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 875311 + ... + 983503.

It is an arithmetic number, because the mean of its divisors is an integer number (6946703964).

Almost surely, 2^100555331551 is an apocalyptic number.

100555331551 is a deficient number, since it is larger than the sum of its proper divisors (10591931873).

100555331551 is a wasteful number, since it uses less digits than its factorization.

100555331551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110610.

The product of its (nonzero) digits is 28125, while the sum is 34.

Adding to 100555331551 its reverse (155133555001), we get a palindrome (255688886552).

The spelling of 100555331551 in words is "one hundred billion, five hundred fifty-five million, three hundred thirty-one thousand, five hundred fifty-one".