513253109 has 2 divisors, whose sum is σ = 513253110. Its totient is φ = 513253108.

The previous prime is 513253087. The next prime is 513253123. The reversal of 513253109 is 901352315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266668900 + 246584209 = 16330^2 + 15703^2 .

It is a cyclic number.

It is not a de Polignac number, because 513253109 - 2¹² = 513249013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513253189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256626554 + 256626555.

It is an arithmetic number, because the mean of its divisors is an integer number (256626555).

Almost surely, 2^513253109 is an apocalyptic number.

It is an amenable number.

513253109 is a deficient number, since it is larger than the sum of its proper divisors (1).

513253109 is an equidigital number, since it uses as much as digits as its factorization.

513253109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 513253109 is about 22655.0901344488. The cubic root of 513253109 is about 800.6521292024.

The spelling of 513253109 in words is "five hundred thirteen million, two hundred fifty-three thousand, one hundred nine".