1131155056 has 10 divisors (see below), whose sum is σ = 2191612952. Its totient is φ = 565577520.

The previous prime is 1131155041. The next prime is 1131155059. The reversal of 1131155056 is 6505511311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131155059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35348580 + ... + 35348611.

Almost surely, 2^1131155056 is an apocalyptic number.

1131155056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1131155056 is a deficient number, since it is larger than the sum of its proper divisors (1060457896).

1131155056 is an equidigital number, since it uses as much as digits as its factorization.

1131155056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70697199 (or 70697193 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 1131155056 is about 33632.6486616799. The cubic root of 1131155056 is about 1041.9352084116.

Adding to 1131155056 its reverse (6505511311), we get a palindrome (7636666367).

The spelling of 1131155056 in words is "one billion, one hundred thirty-one million, one hundred fifty-five thousand, fifty-six".