1320220331 has 8 divisors (see below), whose sum is σ = 1374794400. Its totient is φ = 1266249600.

The previous prime is 1320220313. The next prime is 1320220351. The reversal of 1320220331 is 1330220231.

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 1320220331 - 2²⁶ = 1253111467 is a prime.

It is a super-2 number, since 2×1320220331² = 3485963444771499122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320220351) 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, 146366 + ... + 155123.

It is an arithmetic number, because the mean of its divisors is an integer number (171849300).

Almost surely, 2^1320220331 is an apocalyptic number.

1320220331 is a deficient number, since it is larger than the sum of its proper divisors (54574069).

1320220331 is a wasteful number, since it uses less digits than its factorization.

1320220331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301669.

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

The square root of 1320220331 is about 36334.8363282401. The cubic root of 1320220331 is about 1097.0223410764.

Adding to 1320220331 its reverse (1330220231), we get a palindrome (2650440562).

It can be divided in two parts, 13202 and 20331, that added together give a palindrome (33533).

The spelling of 1320220331 in words is "one billion, three hundred twenty million, two hundred twenty thousand, three hundred thirty-one".