1131225543 has 48 divisors (see below), whose sum is σ = 1997835840. Its totient is φ = 602062848.

The previous prime is 1131225517. The next prime is 1131225559. The reversal of 1131225543 is 3455221311.

1131225543 is a `hidden beast` number, since 113 + 1 + 2 + 2 + 5 + 543 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1131225543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131221543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98443 + ... + 109331.

It is an arithmetic number, because the mean of its divisors is an integer number (41621580).

Almost surely, 2^1131225543 is an apocalyptic number.

1131225543 is a deficient number, since it is larger than the sum of its proper divisors (866610297).

1131225543 is a wasteful number, since it uses less digits than its factorization.

1131225543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11016 (or 11013 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1131225543 is about 33633.6965408205. The cubic root of 1131225543 is about 1041.9568504082.

Adding to 1131225543 its reverse (3455221311), we get a palindrome (4586446854).

The spelling of 1131225543 in words is "one billion, one hundred thirty-one million, two hundred twenty-five thousand, five hundred forty-three".