1220331305 has 8 divisors (see below), whose sum is σ = 1465128000. Its totient is φ = 975778096.

The previous prime is 1220331283. The next prime is 1220331311. The reversal of 1220331305 is 5031330221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220331305 - 2⁶ = 1220331241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49655 + ... + 70044.

It is an arithmetic number, because the mean of its divisors is an integer number (183141000).

Almost surely, 2^1220331305 is an apocalyptic number.

It is an amenable number.

1220331305 is a deficient number, since it is larger than the sum of its proper divisors (244796695).

1220331305 is a wasteful number, since it uses less digits than its factorization.

1220331305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121743.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1220331305 is about 34933.2406884904. The cubic root of 1220331305 is about 1068.6264452314.

Adding to 1220331305 its reverse (5031330221), we get a palindrome (6251661526).

The spelling of 1220331305 in words is "one billion, two hundred twenty million, three hundred thirty-one thousand, three hundred five".