331604 has 24 divisors (see below), whose sum is σ = 715008. Its totient is φ = 131040.

The previous prime is 331603. The next prime is 331609. The reversal of 331604 is 406133.

331604 = T₂₂ + T₂₃ + ... + T₁₂₅.

It is a super-2 number, since 2×331604² = 219922425632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331603) 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, 92 + ... + 819.

It is an arithmetic number, because the mean of its divisors is an integer number (29792).

2³³¹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

331604 is an abundant number, since it is smaller than the sum of its proper divisors (383404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331604 is a wasteful number, since it uses less digits than its factorization.

331604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 331604 is about 575.8506750886. The cubic root of 331604 is about 69.2160142028.

Adding to 331604 its reverse (406133), we get a palindrome (737737).

Subtracting 331604 from its reverse (406133), we obtain a square (74529 = 273²).

The spelling of 331604 in words is "three hundred thirty-one thousand, six hundred four".