331487 has 8 divisors (see below), whose sum is σ = 365904. Its totient is φ = 298368.

The previous prime is 331451. The next prime is 331489. The reversal of 331487 is 784133.

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

It is a cyclic number.

It is not a de Polignac number, because 331487 - 2⁶ = 331423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331487.

It is not an unprimeable number, because it can be changed into a prime (331489) 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, 263 + ... + 855.

It is an arithmetic number, because the mean of its divisors is an integer number (45738).

2³³¹⁴⁸⁷ is an apocalyptic number.

331487 is a deficient number, since it is larger than the sum of its proper divisors (34417).

331487 is a wasteful number, since it uses less digits than its factorization.

331487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649.

The product of its digits is 2016, while the sum is 26.

The square root of 331487 is about 575.7490772898. The cubic root of 331487 is about 69.2078727386.

It can be divided in two parts, 331 and 487, that added together give a palindrome (818).

The spelling of 331487 in words is "three hundred thirty-one thousand, four hundred eighty-seven".