991150530 has 16 divisors (see below), whose sum is σ = 2378761344. Its totient is φ = 264306800.

The previous prime is 991150529. The next prime is 991150543. The reversal of 991150530 is 35051199.

It is a junction number, because it is equal to n+sod(n) for n = 991150491 and 991150500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16519146 + ... + 16519205.

It is an arithmetic number, because the mean of its divisors is an integer number (148672584).

Almost surely, 2^991150530 is an apocalyptic number.

991150530 is an abundant number, since it is smaller than the sum of its proper divisors (1387610814).

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

991150530 is a wasteful number, since it uses less digits than its factorization.

991150530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33038361.

The product of its (nonzero) digits is 6075, while the sum is 33.

The square root of 991150530 is about 31482.5432581296. The cubic root of 991150530 is about 997.0414321753.

The spelling of 991150530 in words is "nine hundred ninety-one million, one hundred fifty thousand, five hundred thirty".