516318249 has 4 divisors (see below), whose sum is σ = 688424336. Its totient is φ = 344212164.

The previous prime is 516318241. The next prime is 516318251. The reversal of 516318249 is 942813615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 516318249 - 2³ = 516318241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516318241) 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, 86053039 + ... + 86053044.

It is an arithmetic number, because the mean of its divisors is an integer number (172106084).

Almost surely, 2^516318249 is an apocalyptic number.

It is an amenable number.

516318249 is a deficient number, since it is larger than the sum of its proper divisors (172106087).

516318249 is a wasteful number, since it uses less digits than its factorization.

516318249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172106086.

The product of its digits is 51840, while the sum is 39.

The square root of 516318249 is about 22722.6373689323. The cubic root of 516318249 is about 802.2427944861.

The spelling of 516318249 in words is "five hundred sixteen million, three hundred eighteen thousand, two hundred forty-nine".