331405487 has 8 divisors (see below), whose sum is σ = 382427136. Its totient is φ = 281303352.

The previous prime is 331405457. The next prime is 331405513. The reversal of 331405487 is 784504133.

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 331405487 - 2⁸ = 331405231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331405457) 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, 229103 + ... + 230544.

It is an arithmetic number, because the mean of its divisors is an integer number (47803392).

Almost surely, 2^331405487 is an apocalyptic number.

331405487 is a deficient number, since it is larger than the sum of its proper divisors (51021649).

331405487 is a wasteful number, since it uses less digits than its factorization.

331405487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459757.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 331405487 is about 18204.5457784587. The cubic root of 331405487 is about 692.0219951076.

The spelling of 331405487 in words is "three hundred thirty-one million, four hundred five thousand, four hundred eighty-seven".