1320000331 has 4 divisors (see below), whose sum is σ = 1421538832. Its totient is φ = 1218461832.

The previous prime is 1320000329. The next prime is 1320000349. The reversal of 1320000331 is 1330000231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320000331 - 2¹ = 1320000329 is a prime.

It is a super-2 number, since 2×1320000331² = 3484801747680219122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 101538487 = 1320000331 / (1 + 3 + 2 + 0 + 0 + 0 + 0 + 3 + 3 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320000301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50769231 + ... + 50769256.

It is an arithmetic number, because the mean of its divisors is an integer number (355384708).

Almost surely, 2^1320000331 is an apocalyptic number.

1320000331 is a deficient number, since it is larger than the sum of its proper divisors (101538501).

1320000331 is a wasteful number, since it uses less digits than its factorization.

1320000331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101538500.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 1320000331 is about 36331.8088044072. The cubic root of 1320000331 is about 1096.9614021770.

Adding to 1320000331 its reverse (1330000231), we get a palindrome (2650000562).

The spelling of 1320000331 in words is "one billion, three hundred twenty million, three hundred thirty-one", and thus it is an aban number.