516215172 has 48 divisors (see below), whose sum is σ = 1344575232. Its totient is φ = 152789280.

The previous prime is 516215159. The next prime is 516215173. The reversal of 516215172 is 271512615.

It is not an unprimeable number, because it can be changed into a prime (516215173) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 39798 + ... + 51149.

It is an arithmetic number, because the mean of its divisors is an integer number (28011984).

Almost surely, 2^516215172 is an apocalyptic number.

It is an amenable number.

516215172 is an abundant number, since it is smaller than the sum of its proper divisors (828360060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

516215172 is a wasteful number, since it uses less digits than its factorization.

516215172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91008 (or 91006 counting only the distinct ones).

The product of its digits is 4200, while the sum is 30.

The square root of 516215172 is about 22720.3690991146. The cubic root of 516215172 is about 802.1894047508.

Adding to 516215172 its reverse (271512615), we get a palindrome (787727787).

The spelling of 516215172 in words is "five hundred sixteen million, two hundred fifteen thousand, one hundred seventy-two".