220444123 has 4 divisors (see below), whose sum is σ = 220526560. Its totient is φ = 220361688.

The previous prime is 220444111. The next prime is 220444127. The reversal of 220444123 is 321444022.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220444123 is a prime.

It is a super-2 number, since 2×220444123² = 97191222730478258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220444094 and 220444103.

It is not an unprimeable number, because it can be changed into a prime (220444127) 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, 37068 + ... + 42601.

It is an arithmetic number, because the mean of its divisors is an integer number (55131640).

Almost surely, 2^220444123 is an apocalyptic number.

220444123 is a deficient number, since it is larger than the sum of its proper divisors (82437).

220444123 is an equidigital number, since it uses as much as digits as its factorization.

220444123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82436.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 220444123 is about 14847.3608092482. The cubic root of 220444123 is about 604.0870258579.

Adding to 220444123 its reverse (321444022), we get a palindrome (541888145).

The spelling of 220444123 in words is "two hundred twenty million, four hundred forty-four thousand, one hundred twenty-three".