516221072 has 20 divisors (see below), whose sum is σ = 1009529136. Its totient is φ = 255697440.

The previous prime is 516221059. The next prime is 516221117. The reversal of 516221072 is 270122615.

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, 149054 + ... + 152477.

Almost surely, 2^516221072 is an apocalyptic number.

It is an amenable number.

516221072 is a deficient number, since it is larger than the sum of its proper divisors (493308064).

516221072 is a wasteful number, since it uses less digits than its factorization.

516221072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301646 (or 301640 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 516221072 is about 22720.4989381836. The cubic root of 516221072 is about 802.1924609050.

Adding to 516221072 its reverse (270122615), we get a palindrome (786343687).

The spelling of 516221072 in words is "five hundred sixteen million, two hundred twenty-one thousand, seventy-two".