516253321 has 4 divisors (see below), whose sum is σ = 520989700. Its totient is φ = 511516944.

The previous prime is 516253307. The next prime is 516253357. The reversal of 516253321 is 123352615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123352615 = 5 ⋅24670523.

It can be written as a sum of positive squares in 2 ways, for example, as 153884025 + 362369296 = 12405^2 + 19036^2 .

It is not a de Polignac number, because 516253321 - 2⁵ = 516253289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 516253321.

It is not an unprimeable number, because it can be changed into a prime (516253021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2368026 + ... + 2368243.

It is an arithmetic number, because the mean of its divisors is an integer number (130247425).

Almost surely, 2^516253321 is an apocalyptic number.

It is an amenable number.

516253321 is a deficient number, since it is larger than the sum of its proper divisors (4736379).

516253321 is a wasteful number, since it uses less digits than its factorization.

516253321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736378.

The product of its digits is 5400, while the sum is 28.

The square root of 516253321 is about 22721.2086166207. The cubic root of 516253321 is about 802.2091652250.

It can be divided in two parts, 51625 and 3321, that added together give a triangular number (54946 = T₃₃₁).

The spelling of 516253321 in words is "five hundred sixteen million, two hundred fifty-three thousand, three hundred twenty-one".