1131273208 has 16 divisors (see below), whose sum is σ = 2284301880. Its totient is φ = 522126048.

The previous prime is 1131273161. The next prime is 1131273223. The reversal of 1131273208 is 8023721311.

It is a super-3 number, since 3×1131273208³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5438710 + ... + 5438917.

Almost surely, 2^1131273208 is an apocalyptic number.

It is an amenable number.

1131273208 is an abundant number, since it is smaller than the sum of its proper divisors (1153028672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131273208 is a wasteful number, since it uses less digits than its factorization.

1131273208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10877646 (or 10877642 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1131273208 is about 33634.4051233257. The cubic root of 1131273208 is about 1041.9714847359.

Adding to 1131273208 its reverse (8023721311), we get a palindrome (9154994519).

The spelling of 1131273208 in words is "one billion, one hundred thirty-one million, two hundred seventy-three thousand, two hundred eight".