1131223755 has 32 divisors (see below), whose sum is σ = 1869311808. Its totient is φ = 583718400.

The previous prime is 1131223727. The next prime is 1131223763. The reversal of 1131223755 is 5573221311.

1131223755 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1131223755 - 2⁷ = 1131223627 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94825 + ... + 106085.

It is an arithmetic number, because the mean of its divisors is an integer number (58415994).

Almost surely, 2^1131223755 is an apocalyptic number.

1131223755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1131223755 is a deficient number, since it is larger than the sum of its proper divisors (738088053).

1131223755 is a wasteful number, since it uses less digits than its factorization.

1131223755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487.

The product of its digits is 6300, while the sum is 30.

The square root of 1131223755 is about 33633.6699603240. The cubic root of 1131223755 is about 1041.9563014402.

The spelling of 1131223755 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, seven hundred fifty-five".