505021105 has 4 divisors (see below), whose sum is σ = 606025332. Its totient is φ = 404016880.

The previous prime is 505021087. The next prime is 505021117. The reversal of 505021105 is 501120505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501120505 = 5 ⋅100224101.

It can be written as a sum of positive squares in 2 ways, for example, as 134189056 + 370832049 = 11584^2 + 19257^2 .

It is not a de Polignac number, because 505021105 - 2⁵ = 505021073 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, 50502106 + ... + 50502115.

It is an arithmetic number, because the mean of its divisors is an integer number (151506333).

Almost surely, 2^505021105 is an apocalyptic number.

It is an amenable number.

505021105 is a deficient number, since it is larger than the sum of its proper divisors (101004227).

505021105 is a wasteful number, since it uses less digits than its factorization.

505021105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101004226.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 505021105 is about 22472.6746294250. The cubic root of 505021105 is about 796.3485175566.

The spelling of 505021105 in words is "five hundred five million, twenty-one thousand, one hundred five".