1131550265 has 16 divisors (see below), whose sum is σ = 1386363600. Its totient is φ = 886309632.

The previous prime is 1131550229. The next prime is 1131550283. The reversal of 1131550265 is 5620551311.

It can be written as a sum of positive squares in 8 ways, for example, as 187032976 + 944517289 = 13676^2 + 30733^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131550265 - 2⁸ = 1131550009 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130691 + ... + 139079.

It is an arithmetic number, because the mean of its divisors is an integer number (86647725).

Almost surely, 2^1131550265 is an apocalyptic number.

It is an amenable number.

1131550265 is a deficient number, since it is larger than the sum of its proper divisors (254813335).

1131550265 is an equidigital number, since it uses as much as digits as its factorization.

1131550265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8956.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1131550265 is about 33638.5235258624. The cubic root of 1131550265 is about 1042.0565399131.

The spelling of 1131550265 in words is "one billion, one hundred thirty-one million, five hundred fifty thousand, two hundred sixty-five".