220815424 has 14 divisors (see below), whose sum is σ = 438180734. Its totient is φ = 110407680.

The previous prime is 220815421. The next prime is 220815443. The reversal of 220815424 is 424518022.

It can be written as a sum of positive squares in only one way, i.e., 220225600 + 589824 = 14840^2 + 768^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220815392 and 220815401.

It is not an unprimeable number, because it can be changed into a prime (220815421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1725057 + ... + 1725184.

Almost surely, 2^220815424 is an apocalyptic number.

It is an amenable number.

220815424 is a deficient number, since it is larger than the sum of its proper divisors (217365310).

220815424 is an equidigital number, since it uses as much as digits as its factorization.

220815424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450253 (or 3450243 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 220815424 is about 14859.8594878956. The cubic root of 220815424 is about 604.4259965695.

The spelling of 220815424 in words is "two hundred twenty million, eight hundred fifteen thousand, four hundred twenty-four".