1165355216 has 20 divisors (see below), whose sum is σ = 2259500100. Its totient is φ = 582258432.

The previous prime is 1165355209. The next prime is 1165355239. The reversal of 1165355216 is 6125535611.

It can be written as a sum of positive squares in 2 ways, for example, as 122323600 + 1043031616 = 11060^2 + 32296^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2621 + ... + 48348.

It is an arithmetic number, because the mean of its divisors is an integer number (112975005).

Almost surely, 2^1165355216 is an apocalyptic number.

1165355216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1165355216 is a deficient number, since it is larger than the sum of its proper divisors (1094144884).

1165355216 is a wasteful number, since it uses less digits than its factorization.

1165355216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52406 (or 52400 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 1165355216 is about 34137.2994831167. The cubic root of 1165355216 is about 1052.3319948566.

The spelling of 1165355216 in words is "one billion, one hundred sixty-five million, three hundred fifty-five thousand, two hundred sixteen".