516222251 has 2 divisors, whose sum is σ = 516222252. Its totient is φ = 516222250.

The previous prime is 516222247. The next prime is 516222269. The reversal of 516222251 is 152222615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 516222251 - 2² = 516222247 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 516222251.

It is not a weakly prime, because it can be changed into another prime (516222151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258111125 + 258111126.

It is an arithmetic number, because the mean of its divisors is an integer number (258111126).

Almost surely, 2^516222251 is an apocalyptic number.

516222251 is a deficient number, since it is larger than the sum of its proper divisors (1).

516222251 is an equidigital number, since it uses as much as digits as its factorization.

516222251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 26.

The square root of 516222251 is about 22720.5248839018. The cubic root of 516222251 is about 802.1930716150.

Adding to 516222251 its reverse (152222615), we get a palindrome (668444866).

The spelling of 516222251 in words is "five hundred sixteen million, two hundred twenty-two thousand, two hundred fifty-one".