331616731 has 8 divisors (see below), whose sum is σ = 339611184. Its totient is φ = 323635200.

The previous prime is 331616689. The next prime is 331616741. The reversal of 331616731 is 137616133.

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

It is a de Polignac number, because none of the positive numbers 2^k-331616731 is a prime.

It is a super-3 number, since 3×331616731³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331616693 and 331616702.

It is not an unprimeable number, because it can be changed into a prime (331616741) 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, 66435 + ... + 71251.

It is an arithmetic number, because the mean of its divisors is an integer number (42451398).

Almost surely, 2^331616731 is an apocalyptic number.

331616731 is a deficient number, since it is larger than the sum of its proper divisors (7994453).

331616731 is a wasteful number, since it uses less digits than its factorization.

331616731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461.

The product of its digits is 6804, while the sum is 31.

The square root of 331616731 is about 18210.3468116343. The cubic root of 331616731 is about 692.1689997596.

The spelling of 331616731 in words is "three hundred thirty-one million, six hundred sixteen thousand, seven hundred thirty-one".