220005545 has 8 divisors (see below), whose sum is σ = 264260040. Its totient is φ = 175835520.

The previous prime is 220005523. The next prime is 220005547. The reversal of 220005545 is 545500022.

It can be written as a sum of positive squares in 4 ways, for example, as 36348841 + 183656704 = 6029^2 + 13552^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-220005545 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220005545.

It is not an unprimeable number, because it can be changed into a prime (220005547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15236 + ... + 25925.

It is an arithmetic number, because the mean of its divisors is an integer number (33032505).

Almost surely, 2^220005545 is an apocalyptic number.

It is an amenable number.

220005545 is a deficient number, since it is larger than the sum of its proper divisors (44254495).

220005545 is a wasteful number, since it uses less digits than its factorization.

220005545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42235.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 220005545 is about 14832.5838949254. The cubic root of 220005545 is about 603.6861454728.

Adding to 220005545 its reverse (545500022), we get a palindrome (765505567).

The spelling of 220005545 in words is "two hundred twenty million, five thousand, five hundred forty-five".