616001331 has 8 divisors (see below), whose sum is σ = 896001984. Its totient is φ = 373334120.

The previous prime is 616001311. The next prime is 616001357. The reversal of 616001331 is 133100616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-616001331 is a prime.

It is a super-2 number, since 2×616001331² = 758915279587543122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 616001298 and 616001307.

It is not an unprimeable number, because it can be changed into a prime (616001311) 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, 9333321 + ... + 9333386.

It is an arithmetic number, because the mean of its divisors is an integer number (112000248).

Almost surely, 2^616001331 is an apocalyptic number.

616001331 is a deficient number, since it is larger than the sum of its proper divisors (280000653).

616001331 is a wasteful number, since it uses less digits than its factorization.

616001331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18666721.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 616001331 is about 24819.3741057264. The cubic root of 616001331 is about 850.8647858474.

Adding to 616001331 its reverse (133100616), we get a palindrome (749101947).

The spelling of 616001331 in words is "six hundred sixteen million, one thousand, three hundred thirty-one".