220123500 has 48 divisors (see below), whose sum is σ = 641004000. Its totient is φ = 58699200.

The previous prime is 220123499. The next prime is 220123537. The reversal of 220123500 is 5321022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 220123500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71875 + ... + 74874.

It is an arithmetic number, because the mean of its divisors is an integer number (13354250).

Almost surely, 2^220123500 is an apocalyptic number.

220123500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220123500 is an abundant number, since it is smaller than the sum of its proper divisors (420880500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220123500 is a wasteful number, since it uses less digits than its factorization.

220123500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146771 (or 146759 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 220123500 is about 14836.5595742409. The cubic root of 220123500 is about 603.7940140831.

Adding to 220123500 its reverse (5321022), we get a palindrome (225444522).

The spelling of 220123500 in words is "two hundred twenty million, one hundred twenty-three thousand, five hundred".