513220061 has 4 divisors (see below), whose sum is σ = 513331932. Its totient is φ = 513108192.

The previous prime is 513220051. The next prime is 513220073. The reversal of 513220061 is 160022315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160022315 = 5 ⋅32004463.

It can be written as a sum of positive squares in 2 ways, for example, as 302099161 + 211120900 = 17381^2 + 14530^2 .

It is a cyclic number.

It is not a de Polignac number, because 513220061 - 2¹⁸ = 512957917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513220031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48746 + ... + 58331.

It is an arithmetic number, because the mean of its divisors is an integer number (128332983).

Almost surely, 2^513220061 is an apocalyptic number.

It is an amenable number.

513220061 is a deficient number, since it is larger than the sum of its proper divisors (111871).

513220061 is a wasteful number, since it uses less digits than its factorization.

513220061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111870.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 513220061 is about 22654.3607501955. The cubic root of 513220061 is about 800.6349443612.

Adding to 513220061 its reverse (160022315), we get a palindrome (673242376).

The spelling of 513220061 in words is "five hundred thirteen million, two hundred twenty thousand, sixty-one".