2251163216 has 20 divisors (see below), whose sum is σ = 4362974100. Its totient is φ = 1125234432.

The previous prime is 2251163209. The next prime is 2251163221. The reversal of 2251163216 is 6123611522.

It can be written as a sum of positive squares in 2 ways, for example, as 681418816 + 1569744400 = 26104^2 + 39620^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36530 + ... + 76398.

It is an arithmetic number, because the mean of its divisors is an integer number (218148705).

Almost surely, 2^2251163216 is an apocalyptic number.

It is an amenable number.

2251163216 is a deficient number, since it is larger than the sum of its proper divisors (2111810884).

2251163216 is a wasteful number, since it uses less digits than its factorization.

2251163216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43406 (or 43400 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 2251163216 is about 47446.4246914349. The cubic root of 2251163216 is about 1310.5964721512.

Adding to 2251163216 its reverse (6123611522), we get a palindrome (8374774738).

The spelling of 2251163216 in words is "two billion, two hundred fifty-one million, one hundred sixty-three thousand, two hundred sixteen".