201100505 has 8 divisors (see below), whose sum is σ = 241422792. Its totient is φ = 160812288.

The previous prime is 201100489. The next prime is 201100507. The reversal of 201100505 is 505001102.

It can be written as a sum of positive squares in 4 ways, for example, as 65983129 + 135117376 = 8123^2 + 11624^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201100505 - 2⁴ = 201100489 is a prime.

It is a super-2 number, since 2×201100505² = 80882826222510050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201100505.

It is not an unprimeable number, because it can be changed into a prime (201100507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7067 + ... + 21263.

It is an arithmetic number, because the mean of its divisors is an integer number (30177849).

Almost surely, 2^201100505 is an apocalyptic number.

It is an amenable number.

201100505 is a deficient number, since it is larger than the sum of its proper divisors (40322287).

201100505 is a wasteful number, since it uses less digits than its factorization.

201100505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17035.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 201100505 is about 14180.9909738354. The cubic root of 201100505 is about 585.8742182870.

Adding to 201100505 its reverse (505001102), we get a palindrome (706101607).

The spelling of 201100505 in words is "two hundred one million, one hundred thousand, five hundred five".