513881 has 2 divisors, whose sum is σ = 513882. Its totient is φ = 513880.

The previous prime is 513871. The next prime is 513899. The reversal of 513881 is 188315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512656 + 1225 = 716^2 + 35^2 .

It is a cyclic number.

It is not a de Polignac number, because 513881 - 2¹⁸ = 251737 is a prime.

It is a super-2 number, since 2×513881² = 528147364322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 513881.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 513881.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256940 + 256941.

It is an arithmetic number, because the mean of its divisors is an integer number (256941).

2⁵¹³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

513881 is a deficient number, since it is larger than the sum of its proper divisors (1).

513881 is an equidigital number, since it uses as much as digits as its factorization.

513881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 26.

The square root of 513881 is about 716.8549365109. The cubic root of 513881 is about 80.0978490208.

The spelling of 513881 in words is "five hundred thirteen thousand, eight hundred eighty-one".