5211865 has 4 divisors (see below), whose sum is σ = 6254244. Its totient is φ = 4169488.

The previous prime is 5211853. The next prime is 5211881. The reversal of 5211865 is 5681125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2442969 + 2768896 = 1563^2 + 1664^2 .

It is a cyclic number.

It is not a de Polignac number, because 5211865 - 2¹¹ = 5209817 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 521182 + ... + 521191.

It is an arithmetic number, because the mean of its divisors is an integer number (1563561).

Almost surely, 2^5211865 is an apocalyptic number.

It is an amenable number.

5211865 is a deficient number, since it is larger than the sum of its proper divisors (1042379).

5211865 is a wasteful number, since it uses less digits than its factorization.

5211865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042378.

The product of its digits is 2400, while the sum is 28.

The square root of 5211865 is about 2282.9509412162. The cubic root of 5211865 is about 173.3794892698.

The spelling of 5211865 in words is "five million, two hundred eleven thousand, eight hundred sixty-five".