516509101 has 4 divisors (see below), whose sum is σ = 521080092. Its totient is φ = 511938112.

The previous prime is 516509099. The next prime is 516509131. The reversal of 516509101 is 101905615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10304100 + 506205001 = 3210^2 + 22499^2 .

It is a cyclic number.

It is not a de Polignac number, because 516509101 - 2¹ = 516509099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 516509101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516509131) 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 3 ways as a sum of consecutive naturals, for example, 2285326 + ... + 2285551.

It is an arithmetic number, because the mean of its divisors is an integer number (130270023).

Almost surely, 2^516509101 is an apocalyptic number.

It is an amenable number.

516509101 is a deficient number, since it is larger than the sum of its proper divisors (4570991).

516509101 is a wasteful number, since it uses less digits than its factorization.

516509101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570990.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 516509101 is about 22726.8365814515. The cubic root of 516509101 is about 802.3416293816.

The spelling of 516509101 in words is "five hundred sixteen million, five hundred nine thousand, one hundred one".