1220312530 has 64 divisors (see below), whose sum is σ = 2382255360. Its totient is φ = 448395264.

The previous prime is 1220312521. The next prime is 1220312531. The reversal of 1220312530 is 352130221.

It is a junction number, because it is equal to n+sod(n) for n = 1220312498 and 1220312507.

It is not an unprimeable number, because it can be changed into a prime (1220312531) 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 31 ways as a sum of consecutive naturals, for example, 1327411 + ... + 1328329.

It is an arithmetic number, because the mean of its divisors is an integer number (37222740).

Almost surely, 2^1220312530 is an apocalyptic number.

1220312530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220312530 is a deficient number, since it is larger than the sum of its proper divisors (1161942830).

1220312530 is a wasteful number, since it uses less digits than its factorization.

1220312530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1220312530 is about 34932.9719605991. The cubic root of 1220312530 is about 1068.6209648714.

Adding to 1220312530 its reverse (352130221), we get a palindrome (1572442751).

The spelling of 1220312530 in words is "one billion, two hundred twenty million, three hundred twelve thousand, five hundred thirty".