862216505 has 16 divisors (see below), whose sum is σ = 1050963984. Its totient is φ = 678942720.

The previous prime is 862216483. The next prime is 862216529. The reversal of 862216505 is 505612268.

It can be written as a sum of positive squares in 8 ways, for example, as 2319529 + 859896976 = 1523^2 + 29324^2 .

It is not a de Polignac number, because 862216505 - 2¹⁶ = 862150969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201185 + ... + 205425.

It is an arithmetic number, because the mean of its divisors is an integer number (65685249).

Almost surely, 2^862216505 is an apocalyptic number.

It is an amenable number.

862216505 is a deficient number, since it is larger than the sum of its proper divisors (188747479).

862216505 is a wasteful number, since it uses less digits than its factorization.

862216505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4876.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 862216505 is about 29363.5233750992. The cubic root of 862216505 is about 951.7848274528.

The spelling of 862216505 in words is "eight hundred sixty-two million, two hundred sixteen thousand, five hundred five".