513120173 has 2 divisors, whose sum is σ = 513120174. Its totient is φ = 513120172.

The previous prime is 513120151. The next prime is 513120221. The reversal of 513120173 is 371021315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425473129 + 87647044 = 20627^2 + 9362^2 .

It is a cyclic number.

It is not a de Polignac number, because 513120173 - 2⁸ = 513119917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513120143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256560086 + 256560087.

It is an arithmetic number, because the mean of its divisors is an integer number (256560087).

Almost surely, 2^513120173 is an apocalyptic number.

It is an amenable number.

513120173 is a deficient number, since it is larger than the sum of its proper divisors (1).

513120173 is an equidigital number, since it uses as much as digits as its factorization.

513120173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 513120173 is about 22652.1560342498. The cubic root of 513120173 is about 800.5829984753.

Adding to 513120173 its reverse (371021315), we get a palindrome (884141488).

The spelling of 513120173 in words is "five hundred thirteen million, one hundred twenty thousand, one hundred seventy-three".