999999522 has 24 divisors (see below), whose sum is σ = 2199006576. Its totient is φ = 328357656.

The previous prime is 999999503. The next prime is 999999527. The reversal of 999999522 is 225999999.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999999522.

It is not an unprimeable number, because it can be changed into a prime (999999527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413388 + ... + 415799.

It is an arithmetic number, because the mean of its divisors is an integer number (91625274).

Almost surely, 2^999999522 is an apocalyptic number.

999999522 is an abundant number, since it is smaller than the sum of its proper divisors (1199007054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999999522 is a wasteful number, since it uses less digits than its factorization.

999999522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829262 (or 829259 counting only the distinct ones).

The product of its digits is 10628820, while the sum is 63.

The square root of 999999522 is about 31622.7690438393. The cubic root of 999999522 is about 999.9998406666. Note that the first 3 decimals are identical.

The spelling of 999999522 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred twenty-two".