1131730185 has 16 divisors (see below), whose sum is σ = 1820888640. Its totient is φ = 600216000.

The previous prime is 1131730183. The next prime is 1131730207. The reversal of 1131730185 is 5810371311.

It is not a de Polignac number, because 1131730185 - 2¹ = 1131730183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131730181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208066 + ... + 213435.

It is an arithmetic number, because the mean of its divisors is an integer number (113805540).

Almost surely, 2^1131730185 is an apocalyptic number.

1131730185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131730185 is a deficient number, since it is larger than the sum of its proper divisors (689158455).

1131730185 is a wasteful number, since it uses less digits than its factorization.

1131730185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421688.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1131730185 is about 33641.1977343257. The cubic root of 1131730185 is about 1042.1117670596. Note that the first 3 decimals are identical.

The spelling of 1131730185 in words is "one billion, one hundred thirty-one million, seven hundred thirty thousand, one hundred eighty-five".