1131540305 has 16 divisors (see below), whose sum is σ = 1571473920. Its totient is φ = 766089792.

The previous prime is 1131540283. The next prime is 1131540323. The reversal of 1131540305 is 5030451311.

It is a cyclic number.

It is not a de Polignac number, because 1131540305 - 2²⁶ = 1064431441 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201854 + ... + 207383.

It is an arithmetic number, because the mean of its divisors is an integer number (98217120).

Almost surely, 2^1131540305 is an apocalyptic number.

It is an amenable number.

1131540305 is a deficient number, since it is larger than the sum of its proper divisors (439933615).

1131540305 is an equidigital number, since it uses as much as digits as its factorization.

1131540305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409328.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1131540305 is about 33638.3754809890. The cubic root of 1131540305 is about 1042.0534824812.

Adding to 1131540305 its reverse (5030451311), we get a palindrome (6161991616).

The spelling of 1131540305 in words is "one billion, one hundred thirty-one million, five hundred forty thousand, three hundred five".