516695981 has 8 divisors (see below), whose sum is σ = 538272000. Its totient is φ = 495547360.

The previous prime is 516695953. The next prime is 516695983. The reversal of 516695981 is 189596615.

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-516695981 is a prime.

It is a super-2 number, since 2×516695981² = 533949473563104722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516695983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104381 + ... + 109218.

It is an arithmetic number, because the mean of its divisors is an integer number (67284000).

Almost surely, 2^516695981 is an apocalyptic number.

It is an amenable number.

516695981 is a deficient number, since it is larger than the sum of its proper divisors (21576019).

516695981 is a wasteful number, since it uses less digits than its factorization.

516695981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213699.

The product of its digits is 583200, while the sum is 50.

The square root of 516695981 is about 22730.9476485253. The cubic root of 516695981 is about 802.4383837424.

The spelling of 516695981 in words is "five hundred sixteen million, six hundred ninety-five thousand, nine hundred eighty-one".