220143436 has 24 divisors (see below), whose sum is σ = 390260304. Its totient is φ = 108648960.

The previous prime is 220143433. The next prime is 220143457. The reversal of 220143436 is 634341022.

It is a self number, because there is not a number n which added to its sum of digits gives 220143436.

It is not an unprimeable number, because it can be changed into a prime (220143433) 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, 127056 + ... + 128776.

It is an arithmetic number, because the mean of its divisors is an integer number (16260846).

Almost surely, 2^220143436 is an apocalyptic number.

It is an amenable number.

220143436 is a deficient number, since it is larger than the sum of its proper divisors (170116868).

220143436 is a wasteful number, since it uses less digits than its factorization.

220143436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121 (or 2119 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 220143436 is about 14837.2314129018. The cubic root of 220143436 is about 603.8122415389.

Adding to 220143436 its reverse (634341022), we get a palindrome (854484458).

The spelling of 220143436 in words is "two hundred twenty million, one hundred forty-three thousand, four hundred thirty-six".