999255251 has 2 divisors, whose sum is σ = 999255252. Its totient is φ = 999255250.

The previous prime is 999255247. The next prime is 999255281. The reversal of 999255251 is 152552999.

It is a weak prime.

It is an emirp because it is prime and its reverse (152552999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999255251 - 2² = 999255247 is a prime.

It is a super-2 number, since 2×999255251² = 1997022113302146002, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 999255196 and 999255205.

It is not a weakly prime, because it can be changed into another prime (999255281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499627625 + 499627626.

It is an arithmetic number, because the mean of its divisors is an integer number (499627626).

Almost surely, 2^999255251 is an apocalyptic number.

999255251 is a deficient number, since it is larger than the sum of its proper divisors (1).

999255251 is an equidigital number, since it uses as much as digits as its factorization.

999255251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 364500, while the sum is 47.

The square root of 999255251 is about 31610.9988927905. The cubic root of 999255251 is about 999.7516886799.

The spelling of 999255251 in words is "nine hundred ninety-nine million, two hundred fifty-five thousand, two hundred fifty-one".