100530505 has 4 divisors (see below), whose sum is σ = 120636612. Its totient is φ = 80424400.

The previous prime is 100530491. The next prime is 100530511. The reversal of 100530505 is 505035001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69705801 + 30824704 = 8349^2 + 5552^2 .

It is not a de Polignac number, because 100530505 - 2⁷ = 100530377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10053046 + ... + 10053055.

It is an arithmetic number, because the mean of its divisors is an integer number (30159153).

Almost surely, 2^100530505 is an apocalyptic number.

It is an amenable number.

100530505 is a deficient number, since it is larger than the sum of its proper divisors (20106107).

100530505 is an equidigital number, since it uses as much as digits as its factorization.

100530505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20106106.

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 100530505 is about 10026.4901635617. The cubic root of 100530505 is about 464.9782315319.

Adding to 100530505 its reverse (505035001), we get a palindrome (605565506).

The spelling of 100530505 in words is "one hundred million, five hundred thirty thousand, five hundred five".