1131481365 has 32 divisors (see below), whose sum is σ = 2108042496. Its totient is φ = 507486720.

The previous prime is 1131481361. The next prime is 1131481397. The reversal of 1131481365 is 5631841311.

It is not a de Polignac number, because 1131481365 - 2² = 1131481361 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131481361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96096 + ... + 107225.

It is an arithmetic number, because the mean of its divisors is an integer number (65876328).

Almost surely, 2^1131481365 is an apocalyptic number.

1131481365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131481365 is a deficient number, since it is larger than the sum of its proper divisors (976561131).

1131481365 is a wasteful number, since it uses less digits than its factorization.

1131481365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203389.

The product of its digits is 8640, while the sum is 33.

The square root of 1131481365 is about 33637.4993868450. The cubic root of 1131481365 is about 1042.0353892390.

The spelling of 1131481365 in words is "one billion, one hundred thirty-one million, four hundred eighty-one thousand, three hundred sixty-five".