999522305 has 8 divisors (see below), whose sum is σ = 1238118144. Its totient is φ = 773823600.

The previous prime is 999522301. The next prime is 999522343. The reversal of 999522305 is 503225999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 999522305 - 2² = 999522301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (999522301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3224111 + ... + 3224420.

It is an arithmetic number, because the mean of its divisors is an integer number (154764768).

It is a Proth number, since it is equal to 30503 ⋅ 2¹⁵ + 1 and 30503 < 2¹⁵.

Almost surely, 2^999522305 is an apocalyptic number.

It is an amenable number.

999522305 is a deficient number, since it is larger than the sum of its proper divisors (238595839).

999522305 is a wasteful number, since it uses less digits than its factorization.

999522305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6448567.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 999522305 is about 31615.2226783238. Note that the first 3 decimals coincide. The cubic root of 999522305 is about 999.8407429719.

The spelling of 999522305 in words is "nine hundred ninety-nine million, five hundred twenty-two thousand, three hundred five".