1183113281 has 12 divisors (see below), whose sum is σ = 1405559808. Its totient is φ = 992518632.

The previous prime is 1183113251. The next prime is 1183113287. The reversal of 1183113281 is 1823113811.

It is not a de Polignac number, because 1183113281 - 2¹⁰ = 1183112257 is a prime.

It is a super-2 number, since 2×1183113281² = 2799514071357169922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1183113287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254561 + ... + 259166.

It is an arithmetic number, because the mean of its divisors is an integer number (117129984).

Almost surely, 2^1183113281 is an apocalyptic number.

It is an amenable number.

1183113281 is a deficient number, since it is larger than the sum of its proper divisors (222446527).

1183113281 is an equidigital number, since it uses as much as digits as its factorization.

1183113281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513788 (or 513781 counting only the distinct ones).

The product of its digits is 1152, while the sum is 29.

The square root of 1183113281 is about 34396.4137810906. The cubic root of 1183113281 is about 1057.6503314870.

The spelling of 1183113281 in words is "one billion, one hundred eighty-three million, one hundred thirteen thousand, two hundred eighty-one".