1081380331 has 4 divisors (see below), whose sum is σ = 1081482952. Its totient is φ = 1081277712.

The previous prime is 1081380323. The next prime is 1081380343. The reversal of 1081380331 is 1330831801.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1081380331 - 2³ = 1081380323 is a prime.

It is a super-2 number, since 2×1081380331² = 2338766840547339122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1081380331.

It is not an unprimeable number, because it can be changed into a prime (1081381331) 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, 33426 + ... + 57271.

It is an arithmetic number, because the mean of its divisors is an integer number (270370738).

Almost surely, 2^1081380331 is an apocalyptic number.

1081380331 is a deficient number, since it is larger than the sum of its proper divisors (102621).

1081380331 is an equidigital number, since it uses as much as digits as its factorization.

1081380331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102620.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1081380331 is about 32884.3478116869. The cubic root of 1081380331 is about 1026.4224805901.

The spelling of 1081380331 in words is "one billion, eighty-one million, three hundred eighty thousand, three hundred thirty-one".