220503425 has 6 divisors (see below), whose sum is σ = 273424278. Its totient is φ = 176402720.

The previous prime is 220503397. The next prime is 220503427. The reversal of 220503425 is 524305022.

It can be written as a sum of positive squares in 3 ways, for example, as 33825856 + 186677569 = 5816^2 + 13663^2 .

It is not a de Polignac number, because 220503425 - 2⁸ = 220503169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220503425.

It is not an unprimeable number, because it can be changed into a prime (220503427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4410044 + ... + 4410093.

It is an arithmetic number, because the mean of its divisors is an integer number (45570713).

Almost surely, 2^220503425 is an apocalyptic number.

220503425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220503425 is a deficient number, since it is larger than the sum of its proper divisors (52920853).

220503425 is an equidigital number, since it uses as much as digits as its factorization.

220503425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820147 (or 8820142 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 220503425 is about 14849.3577302185. The cubic root of 220503425 is about 604.1411897831.

Adding to 220503425 its reverse (524305022), we get a palindrome (744808447).

The spelling of 220503425 in words is "two hundred twenty million, five hundred three thousand, four hundred twenty-five".