1220320331 has 8 divisors (see below), whose sum is σ = 1225956480. Its totient is φ = 1214695872.

The previous prime is 1220320327. The next prime is 1220320357. The reversal of 1220320331 is 1330230221.

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 1220320331 - 2² = 1220320327 is a prime.

It is a super-2 number, since 2×1220320331² = 2978363420503899122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220320631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257126 + ... + 261828.

It is an arithmetic number, because the mean of its divisors is an integer number (153244560).

Almost surely, 2^1220320331 is an apocalyptic number.

1220320331 is a deficient number, since it is larger than the sum of its proper divisors (5636149).

1220320331 is an equidigital number, since it uses as much as digits as its factorization.

1220320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5845.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1220320331 is about 34933.0836171100. The cubic root of 1220320331 is about 1068.6232419642.

Adding to 1220320331 its reverse (1330230221), we get a palindrome (2550550552).

The spelling of 1220320331 in words is "one billion, two hundred twenty million, three hundred twenty thousand, three hundred thirty-one".