331994 has 12 divisors (see below), whose sum is σ = 541086. Its totient is φ = 151872.

The previous prime is 331973. The next prime is 331997. The reversal of 331994 is 499133.

331994 = T₈₆ + T₈₇ + ... + T₁₃₇.

It can be written as a sum of positive squares in 3 ways, for example, as 34969 + 297025 = 187^2 + 545^2 .

It is a super-2 number, since 2×331994² = 220440032072, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (331997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2882 + ... + 2994.

2³³¹⁹⁹⁴ is an apocalyptic number.

331994 is a deficient number, since it is larger than the sum of its proper divisors (209092).

331994 is a wasteful number, since it uses less digits than its factorization.

331994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 128 counting only the distinct ones).

The product of its digits is 2916, while the sum is 29.

The square root of 331994 is about 576.1892050360. The cubic root of 331994 is about 69.2431385939.

The spelling of 331994 in words is "three hundred thirty-one thousand, nine hundred ninety-four".