332991 has 10 divisors (see below), whose sum is σ = 497552. Its totient is φ = 221940.

The previous prime is 332989. The next prime is 332993. The reversal of 332991 is 199233.

It is an interprime number because it is at equal distance from previous prime (332989) and next prime (332993).

It is not a de Polignac number, because 332991 - 2¹ = 332989 is a prime.

It is a super-2 number, since 2×332991² = 221766012162, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Duffinian number.

332991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (332993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1975 + ... + 2136.

2³³²⁹⁹¹ is an apocalyptic number.

332991 is a deficient number, since it is larger than the sum of its proper divisors (164561).

332991 is an equidigital number, since it uses as much as digits as its factorization.

332991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4123 (or 4114 counting only the distinct ones).

The product of its digits is 1458, while the sum is 27.

The square root of 332991 is about 577.0537236688. The cubic root of 332991 is about 69.3123832372.

The spelling of 332991 in words is "three hundred thirty-two thousand, nine hundred ninety-one".