1131288566 has 4 divisors (see below), whose sum is σ = 1696932852. Its totient is φ = 565644282.

The previous prime is 1131288563. The next prime is 1131288569. The reversal of 1131288566 is 6658821311.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1131288563) and next prime (1131288569).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131288563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282822140 + ... + 282822143.

It is an arithmetic number, because the mean of its divisors is an integer number (424233213).

Almost surely, 2^1131288566 is an apocalyptic number.

1131288566 is a deficient number, since it is larger than the sum of its proper divisors (565644286).

1131288566 is an equidigital number, since it uses as much as digits as its factorization.

1131288566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565644285.

The product of its digits is 69120, while the sum is 41.

The square root of 1131288566 is about 33634.6334304389. The cubic root of 1131288566 is about 1041.9761999321.

The spelling of 1131288566 in words is "one billion, one hundred thirty-one million, two hundred eighty-eight thousand, five hundred sixty-six".