100144505 has 4 divisors (see below), whose sum is σ = 120173412. Its totient is φ = 80115600.

The previous prime is 100144489. The next prime is 100144519. The reversal of 100144505 is 505441001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505441001 = 13 ⋅38880077.

It can be written as a sum of positive squares in 2 ways, for example, as 18567481 + 81577024 = 4309^2 + 9032^2 .

It is not a de Polignac number, because 100144505 - 2⁴ = 100144489 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, 10014446 + ... + 10014455.

It is an arithmetic number, because the mean of its divisors is an integer number (30043353).

Almost surely, 2^100144505 is an apocalyptic number.

It is an amenable number.

100144505 is a deficient number, since it is larger than the sum of its proper divisors (20028907).

100144505 is an equidigital number, since it uses as much as digits as its factorization.

100144505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20028906.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 100144505 is about 10007.2226416724. Note that the first 3 decimals coincide. The cubic root of 100144505 is about 464.3823533522.

Adding to 100144505 its reverse (505441001), we get a palindrome (605585506).

The spelling of 100144505 in words is "one hundred million, one hundred forty-four thousand, five hundred five".