220201445 has 4 divisors (see below), whose sum is σ = 264241740. Its totient is φ = 176161152.

The previous prime is 220201441. The next prime is 220201477. The reversal of 220201445 is 544102022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544102022 = 2 ⋅272051011.

It can be written as a sum of positive squares in 2 ways, for example, as 30891364 + 189310081 = 5558^2 + 13759^2 .

It is a cyclic number.

It is not a de Polignac number, because 220201445 - 2² = 220201441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220201441) 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, 22020140 + ... + 22020149.

It is an arithmetic number, because the mean of its divisors is an integer number (66060435).

Almost surely, 2^220201445 is an apocalyptic number.

It is an amenable number.

220201445 is a deficient number, since it is larger than the sum of its proper divisors (44040295).

220201445 is an equidigital number, since it uses as much as digits as its factorization.

220201445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44040294.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 220201445 is about 14839.1861299736. The cubic root of 220201445 is about 603.8652728244.

Adding to 220201445 its reverse (544102022), we get a palindrome (764303467).

The spelling of 220201445 in words is "two hundred twenty million, two hundred one thousand, four hundred forty-five".