1330891331 has 16 divisors (see below), whose sum is σ = 1663469568. Its totient is φ = 1034448000.

The previous prime is 1330891319. The next prime is 1330891361. The reversal of 1330891331 is 1331980331.

It is a cyclic number.

It is not a de Polignac number, because 1330891331 - 2⁶ = 1330891267 is a prime.

It is a super-2 number, since 2×1330891331² = 3542543469861903122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1330891361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9326 + ... + 52428.

It is an arithmetic number, because the mean of its divisors is an integer number (103966848).

Almost surely, 2^1330891331 is an apocalyptic number.

1330891331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1330891331 is a deficient number, since it is larger than the sum of its proper divisors (332578237).

1330891331 is a wasteful number, since it uses less digits than its factorization.

1330891331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43522.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1330891331 is about 36481.3833482230. The cubic root of 1330891331 is about 1099.9700628216.

The spelling of 1330891331 in words is "one billion, three hundred thirty million, eight hundred ninety-one thousand, three hundred thirty-one".