220143001 has 4 divisors (see below), whose sum is σ = 237077092. Its totient is φ = 203208912.

The previous prime is 220142963. The next prime is 220143029. The reversal of 220143001 is 100341022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83814025 + 136328976 = 9155^2 + 11676^2 .

It is a cyclic number.

It is not a de Polignac number, because 220143001 - 2¹¹ = 220140953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16934077 = 220143001 / (2 + 2 + 0 + 1 + 4 + 3 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220143401) 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, 8467026 + ... + 8467051.

It is an arithmetic number, because the mean of its divisors is an integer number (59269273).

Almost surely, 2^220143001 is an apocalyptic number.

It is an amenable number.

220143001 is a deficient number, since it is larger than the sum of its proper divisors (16934091).

220143001 is a wasteful number, since it uses less digits than its factorization.

220143001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16934090.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 220143001 is about 14837.2167538255. The cubic root of 220143001 is about 603.8118438308.

Adding to 220143001 its reverse (100341022), we get a palindrome (320484023).

The spelling of 220143001 in words is "two hundred twenty million, one hundred forty-three thousand, one".