991533050 has 48 divisors (see below), whose sum is σ = 1945485600. Its totient is φ = 374932800.

The previous prime is 991533019. The next prime is 991533071. The reversal of 991533050 is 50335199.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 991533050.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 627161 + ... + 628739.

It is an arithmetic number, because the mean of its divisors is an integer number (40530950).

Almost surely, 2^991533050 is an apocalyptic number.

991533050 is a deficient number, since it is larger than the sum of its proper divisors (953952550).

991533050 is a wasteful number, since it uses less digits than its factorization.

991533050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271 (or 2266 counting only the distinct ones).

The product of its (nonzero) digits is 18225, while the sum is 35.

The square root of 991533050 is about 31488.6177848441. The cubic root of 991533050 is about 997.1696801807.

The spelling of 991533050 in words is "nine hundred ninety-one million, five hundred thirty-three thousand, fifty".