220532645 has 8 divisors (see below), whose sum is σ = 271094040. Its totient is φ = 172122880.

The previous prime is 220532621. The next prime is 220532647. The reversal of 220532645 is 546235022.

220532645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 35545444 + 184987201 = 5962^2 + 13601^2 .

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

It is not a de Polignac number, because 220532645 - 2¹⁶ = 220467109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220532647) 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, 537680 + ... + 538089.

It is an arithmetic number, because the mean of its divisors is an integer number (33886755).

Almost surely, 2^220532645 is an apocalyptic number.

It is an amenable number.

220532645 is a deficient number, since it is larger than the sum of its proper divisors (50561395).

220532645 is a wasteful number, since it uses less digits than its factorization.

220532645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075815.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 220532645 is about 14850.3415785631. The cubic root of 220532645 is about 604.1678745173.

Adding to 220532645 its reverse (546235022), we get a palindrome (766767667).

The spelling of 220532645 in words is "two hundred twenty million, five hundred thirty-two thousand, six hundred forty-five".