220330434545 has 16 divisors (see below), whose sum is σ = 284769991632. Its totient is φ = 162685393920.

The previous prime is 220330434469. The next prime is 220330434593. The reversal of 220330434545 is 545434033022.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6390883249 + 213939551296 = 79943^2 + 462536^2 .

It is not a de Polignac number, because 220330434545 - 2¹⁸ = 220330172401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329285 + ... + 741005.

It is an arithmetic number, because the mean of its divisors is an integer number (17798124477).

Almost surely, 2^220330434545 is an apocalyptic number.

It is an amenable number.

220330434545 is a deficient number, since it is larger than the sum of its proper divisors (64439557087).

220330434545 is a wasteful number, since it uses less digits than its factorization.

220330434545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419972.

The product of its (nonzero) digits is 172800, while the sum is 35.

Adding to 220330434545 its reverse (545434033022), we get a palindrome (765764467567).

The spelling of 220330434545 in words is "two hundred twenty billion, three hundred thirty million, four hundred thirty-four thousand, five hundred forty-five".