220144123 has 4 divisors (see below), whose sum is σ = 220187808. Its totient is φ = 220100440.

The previous prime is 220144121. The next prime is 220144153. The reversal of 220144123 is 321441022.

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

It is a cyclic number.

It is not a de Polignac number, because 220144123 - 2¹ = 220144121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220144123.

It is not an unprimeable number, because it can be changed into a prime (220144121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13123 + ... + 24748.

It is an arithmetic number, because the mean of its divisors is an integer number (55046952).

Almost surely, 2^220144123 is an apocalyptic number.

220144123 is a deficient number, since it is larger than the sum of its proper divisors (43685).

220144123 is an equidigital number, since it uses as much as digits as its factorization.

220144123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43684.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 220144123 is about 14837.2545641032. The cubic root of 220144123 is about 603.8128696424.

Adding to 220144123 its reverse (321441022), we get a palindrome (541585145).

The spelling of 220144123 in words is "two hundred twenty million, one hundred forty-four thousand, one hundred twenty-three".