1131505713 has 16 divisors (see below), whose sum is σ = 1805251840. Its totient is φ = 696310992.

The previous prime is 1131505699. The next prime is 1131505721. The reversal of 1131505713 is 3175051311.

1131505713 is a `hidden beast` number, since 11 + 31 + 50 + 571 + 3 = 666.

It is not a de Polignac number, because 1131505713 - 2⁵ = 1131505681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131505763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611481 + ... + 1612182.

It is an arithmetic number, because the mean of its divisors is an integer number (112828240).

Almost surely, 2^1131505713 is an apocalyptic number.

1131505713 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1131505713 is a deficient number, since it is larger than the sum of its proper divisors (673746127).

1131505713 is a wasteful number, since it uses less digits than its factorization.

1131505713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223685 (or 3223679 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 27.

The square root of 1131505713 is about 33637.8613024074. The cubic root of 1131505713 is about 1042.0428635985.

The spelling of 1131505713 in words is "one billion, one hundred thirty-one million, five hundred five thousand, seven hundred thirteen".