516572981 has 6 divisors (see below), whose sum is σ = 529481346. Its totient is φ = 503972000.

The previous prime is 516572977. The next prime is 516573011. The reversal of 516572981 is 189275615.

It can be written as a sum of positive squares in 3 ways, for example, as 5134756 + 511438225 = 2266^2 + 22615^2 .

It is not a de Polignac number, because 516572981 - 2² = 516572977 is a prime.

It is a super-2 number, since 2×516572981² = 533695289398452722, 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 (516572941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151970 + ... + 155331.

It is an arithmetic number, because the mean of its divisors is an integer number (88246891).

Almost surely, 2^516572981 is an apocalyptic number.

It is an amenable number.

516572981 is a deficient number, since it is larger than the sum of its proper divisors (12908365).

516572981 is an equidigital number, since it uses as much as digits as its factorization.

516572981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307383 (or 307342 counting only the distinct ones).

The product of its digits is 151200, while the sum is 44.

The square root of 516572981 is about 22728.2419249708. The cubic root of 516572981 is about 802.3747049334.

The spelling of 516572981 in words is "five hundred sixteen million, five hundred seventy-two thousand, nine hundred eighty-one".