1131320225256 has 64 divisors (see below), whose sum is σ = 3046787627520. Its totient is φ = 347992761600.

The previous prime is 1131320225251. The next prime is 1131320225293. The reversal of 1131320225256 is 6525220231311.

It is not an unprimeable number, because it can be changed into a prime (1131320225251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480681 + ... + 1579143.

It is an arithmetic number, because the mean of its divisors is an integer number (47606056680).

Almost surely, 2^{1131320225256} is an apocalyptic number.

It is an amenable number.

1131320225256 is an abundant number, since it is smaller than the sum of its proper divisors (1915467402264).

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

1131320225256 is a wasteful number, since it uses less digits than its factorization.

1131320225256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101786 (or 1101782 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 1131320225256 its reverse (6525220231311), we get a palindrome (7656540456567).

The spelling of 1131320225256 in words is "one trillion, one hundred thirty-one billion, three hundred twenty million, two hundred twenty-five thousand, two hundred fifty-six".