511921216 has 14 divisors (see below), whose sum is σ = 1015843790. Its totient is φ = 255960576.

The previous prime is 511921213. The next prime is 511921217. The reversal of 511921216 is 612129115.

It can be written as a sum of positive squares in only one way, i.e., 432640000 + 79281216 = 20800^2 + 8904^2 .

It is not an unprimeable number, because it can be changed into a prime (511921213) by changing a digit.

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 as a sum of consecutive naturals, namely, 3999321 + ... + 3999448.

Almost surely, 2^511921216 is an apocalyptic number.

It is an amenable number.

511921216 is a deficient number, since it is larger than the sum of its proper divisors (503922574).

511921216 is an equidigital number, since it uses as much as digits as its factorization.

511921216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998781 (or 7998771 counting only the distinct ones).

The product of its digits is 1080, while the sum is 28.

The square root of 511921216 is about 22625.6760340990. The cubic root of 511921216 is about 799.9589645618.

It can be divided in two parts, 5119 and 21216, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 511921216 in words is "five hundred eleven million, nine hundred twenty-one thousand, two hundred sixteen".