100551128 has 8 divisors (see below), whose sum is σ = 188533380. Its totient is φ = 50275560.

The previous prime is 100551127. The next prime is 100551131. The reversal of 100551128 is 821155001.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×100551128² = 20221058684144768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100551127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6284438 + ... + 6284453.

Almost surely, 2^100551128 is an apocalyptic number.

It is an amenable number.

100551128 is a deficient number, since it is larger than the sum of its proper divisors (87982252).

100551128 is a wasteful number, since it uses less digits than its factorization.

100551128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12568897 (or 12568893 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 100551128 is about 10027.5185365074. The cubic root of 100551128 is about 465.0100248349.

The spelling of 100551128 in words is "one hundred million, five hundred fifty-one thousand, one hundred twenty-eight".