1330781331 has 32 divisors (see below), whose sum is σ = 1991808000. Its totient is φ = 783233280.

The previous prime is 1330781297. The next prime is 1330781339. The reversal of 1330781331 is 1331870331.

It is not a de Polignac number, because 1330781331 - 2¹³ = 1330773139 is a prime.

It is a super-2 number, since 2×1330781331² = 3541957901876263122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1330781339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1268095 + ... + 1269143.

It is an arithmetic number, because the mean of its divisors is an integer number (62244000).

Almost surely, 2^1330781331 is an apocalyptic number.

1330781331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1330781331 is a deficient number, since it is larger than the sum of its proper divisors (661026669).

1330781331 is a wasteful number, since it uses less digits than its factorization.

1330781331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 1330781331 is about 36479.8756988014. The cubic root of 1330781331 is about 1099.9397573069.

The spelling of 1330781331 in words is "one billion, three hundred thirty million, seven hundred eighty-one thousand, three hundred thirty-one".