330131981 has 8 divisors (see below), whose sum is σ = 335612640. Its totient is φ = 324667728.

The previous prime is 330131957. The next prime is 330131987. The reversal of 330131981 is 189131033.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-330131981 is a prime.

It is a super-2 number, since 2×330131981² = 217974249757968722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (330131987) 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, 40415 + ... + 47891.

It is an arithmetic number, because the mean of its divisors is an integer number (41951580).

Almost surely, 2^330131981 is an apocalyptic number.

It is an amenable number.

330131981 is a deficient number, since it is larger than the sum of its proper divisors (5480659).

330131981 is an equidigital number, since it uses as much as digits as its factorization.

330131981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8203.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 330131981 is about 18169.5344189112. The cubic root of 330131981 is about 691.1344364362.

The spelling of 330131981 in words is "three hundred thirty million, one hundred thirty-one thousand, nine hundred eighty-one".