220520505 has 16 divisors (see below), whose sum is σ = 354876480. Its totient is φ = 116929728.

The previous prime is 220520501. The next prime is 220520519. The reversal of 220520505 is 505025022.

It is not a de Polignac number, because 220520505 - 2² = 220520501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220520501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39895 + ... + 45084.

It is an arithmetic number, because the mean of its divisors is an integer number (22179780).

Almost surely, 2^220520505 is an apocalyptic number.

It is an amenable number.

220520505 is a deficient number, since it is larger than the sum of its proper divisors (134355975).

220520505 is a wasteful number, since it uses less digits than its factorization.

220520505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85160.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 220520505 is about 14849.9328281309. The cubic root of 220520505 is about 604.1567881276.

Adding to 220520505 its reverse (505025022), we get a palindrome (725545527).

The spelling of 220520505 in words is "two hundred twenty million, five hundred twenty thousand, five hundred five".