513871 has 2 divisors, whose sum is σ = 513872. Its totient is φ = 513870.

The previous prime is 513841. The next prime is 513881. The reversal of 513871 is 178315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513871 - 2⁵ = 513839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256935 + 256936.

It is an arithmetic number, because the mean of its divisors is an integer number (256936).

2⁵¹³⁸⁷¹ is an apocalyptic number.

513871 is a deficient number, since it is larger than the sum of its proper divisors (1).

513871 is an equidigital number, since it uses as much as digits as its factorization.

513871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 25.

The square root of 513871 is about 716.8479615651. The cubic root of 513871 is about 80.0973294559.

The spelling of 513871 in words is "five hundred thirteen thousand, eight hundred seventy-one".