499955251 has 2 divisors, whose sum is σ = 499955252. Its totient is φ = 499955250.

The previous prime is 499955249. The next prime is 499955263. The reversal of 499955251 is 152559994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 499955251 - 2¹ = 499955249 is a prime.

Together with 499955249, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 499955195 and 499955204.

It is not a weakly prime, because it can be changed into another prime (499955551) 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, 249977625 + 249977626.

It is an arithmetic number, because the mean of its divisors is an integer number (249977626).

Almost surely, 2^499955251 is an apocalyptic number.

499955251 is a deficient number, since it is larger than the sum of its proper divisors (1).

499955251 is an equidigital number, since it uses as much as digits as its factorization.

499955251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 49.

The square root of 499955251 is about 22359.6791345493. The cubic root of 499955251 is about 793.6768470745.

The spelling of 499955251 in words is "four hundred ninety-nine million, nine hundred fifty-five thousand, two hundred fifty-one".