513440311 has 2 divisors, whose sum is σ = 513440312. Its totient is φ = 513440310.

The previous prime is 513440269. The next prime is 513440351. The reversal of 513440311 is 113044315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513440311 - 2⁹ = 513439799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513440351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256720155 + 256720156.

It is an arithmetic number, because the mean of its divisors is an integer number (256720156).

Almost surely, 2^513440311 is an apocalyptic number.

513440311 is a deficient number, since it is larger than the sum of its proper divisors (1).

513440311 is an equidigital number, since it uses as much as digits as its factorization.

513440311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 513440311 is about 22659.2213237790. The cubic root of 513440311 is about 800.7494596477.

Adding to 513440311 its reverse (113044315), we get a palindrome (626484626).

The spelling of 513440311 in words is "five hundred thirteen million, four hundred forty thousand, three hundred eleven".