516217853 has 4 divisors (see below), whose sum is σ = 517125660. Its totient is φ = 515310048.

The previous prime is 516217843. The next prime is 516217861. The reversal of 516217853 is 358712615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 305445529 + 210772324 = 17477^2 + 14518^2 .

It is a cyclic number.

It is not a de Polignac number, because 516217853 - 2¹⁰ = 516216829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516217813) 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, 453050 + ... + 454187.

It is an arithmetic number, because the mean of its divisors is an integer number (129281415).

Almost surely, 2^516217853 is an apocalyptic number.

It is an amenable number.

516217853 is a deficient number, since it is larger than the sum of its proper divisors (907807).

516217853 is an equidigital number, since it uses as much as digits as its factorization.

516217853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907806.

The product of its digits is 50400, while the sum is 38.

The square root of 516217853 is about 22720.4280989598. The cubic root of 516217853 is about 802.1907934909.

The spelling of 516217853 in words is "five hundred sixteen million, two hundred seventeen thousand, eight hundred fifty-three".