220325509 has 4 divisors (see below), whose sum is σ = 222597004. Its totient is φ = 218054016.

The previous prime is 220325477. The next prime is 220325527. The reversal of 220325509 is 905523022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 905523022 = 2 ⋅452761511.

It can be written as a sum of positive squares in 2 ways, for example, as 69772609 + 150552900 = 8353^2 + 12270^2 .

It is a cyclic number.

It is not a de Polignac number, because 220325509 - 2⁵ = 220325477 is a prime.

It is a super-2 number, since 2×220325509² = 97086659832218162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220325009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135602 + ... + 1135795.

It is an arithmetic number, because the mean of its divisors is an integer number (55649251).

Almost surely, 2^220325509 is an apocalyptic number.

It is an amenable number.

220325509 is a deficient number, since it is larger than the sum of its proper divisors (2271495).

220325509 is an equidigital number, since it uses as much as digits as its factorization.

220325509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271494.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 220325509 is about 14843.3658245022. The cubic root of 220325509 is about 603.9786597214.

The spelling of 220325509 in words is "two hundred twenty million, three hundred twenty-five thousand, five hundred nine".