1131233256 has 32 divisors (see below), whose sum is σ = 3142315200. Its totient is φ = 377077680.

The previous prime is 1131233239. The next prime is 1131233263. The reversal of 1131233256 is 6523321311.

1131233256 is a `hidden beast` number, since 11 + 312 + 332 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2618380 + ... + 2618811.

It is an arithmetic number, because the mean of its divisors is an integer number (98197350).

Almost surely, 2^1131233256 is an apocalyptic number.

It is an amenable number.

1131233256 is an abundant number, since it is smaller than the sum of its proper divisors (2011081944).

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

1131233256 is a wasteful number, since it uses less digits than its factorization.

1131233256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237206 (or 5237196 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 1131233256 is about 33633.8112024195. The cubic root of 1131233256 is about 1041.9592185168.

Adding to 1131233256 its reverse (6523321311), we get a palindrome (7654554567).

The spelling of 1131233256 in words is "one billion, one hundred thirty-one million, two hundred thirty-three thousand, two hundred fifty-six".