220013545 has 4 divisors (see below), whose sum is σ = 264016260. Its totient is φ = 176010832.

The previous prime is 220013543. The next prime is 220013587. The reversal of 220013545 is 545310022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545310022 = 2 ⋅272655011.

It can be written as a sum of positive squares in 2 ways, for example, as 145829776 + 74183769 = 12076^2 + 8613^2 .

It is a cyclic number.

It is not a de Polignac number, because 220013545 - 2¹ = 220013543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220013543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22001350 + ... + 22001359.

It is an arithmetic number, because the mean of its divisors is an integer number (66004065).

Almost surely, 2^220013545 is an apocalyptic number.

It is an amenable number.

220013545 is a deficient number, since it is larger than the sum of its proper divisors (44002715).

220013545 is an equidigital number, since it uses as much as digits as its factorization.

220013545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44002714.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 220013545 is about 14832.8535690204. The cubic root of 220013545 is about 603.6934626076.

Adding to 220013545 its reverse (545310022), we get a palindrome (765323567).

The spelling of 220013545 in words is "two hundred twenty million, thirteen thousand, five hundred forty-five".