331640013 has 8 divisors (see below), whose sum is σ = 461412288. Its totient is φ = 211480544.

The previous prime is 331640009. The next prime is 331640039. The reversal of 331640013 is 310046133.

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 331640013 - 2² = 331640009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331640093) 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, 2403120 + ... + 2403257.

It is an arithmetic number, because the mean of its divisors is an integer number (57676536).

Almost surely, 2^331640013 is an apocalyptic number.

It is an amenable number.

331640013 is a deficient number, since it is larger than the sum of its proper divisors (129772275).

331640013 is a wasteful number, since it uses less digits than its factorization.

331640013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806403.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 331640013 is about 18210.9860523806. The cubic root of 331640013 is about 692.1851978784.

Adding to 331640013 its reverse (310046133), we get a palindrome (641686146).

The spelling of 331640013 in words is "three hundred thirty-one million, six hundred forty thousand, thirteen".