1131253555 has 8 divisors (see below), whose sum is σ = 1361927952. Its totient is φ = 902053728.

The previous prime is 1131253553. The next prime is 1131253561. The reversal of 1131253555 is 5553521311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131253555 - 2¹ = 1131253553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131253553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366952 + ... + 370021.

It is an arithmetic number, because the mean of its divisors is an integer number (170240994).

Almost surely, 2^1131253555 is an apocalyptic number.

1131253555 is a deficient number, since it is larger than the sum of its proper divisors (230674397).

1131253555 is an equidigital number, since it uses as much as digits as its factorization.

1131253555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737285.

The product of its digits is 11250, while the sum is 31.

The square root of 1131253555 is about 33634.1129658566. The cubic root of 1131253555 is about 1041.9654508312.

Adding to 1131253555 its reverse (5553521311), we get a palindrome (6684774866).

The spelling of 1131253555 in words is "one billion, one hundred thirty-one million, two hundred fifty-three thousand, five hundred fifty-five".