1130531555 has 8 divisors (see below), whose sum is σ = 1358493072. Its totient is φ = 903188448.

The previous prime is 1130531543. The next prime is 1130531557. The reversal of 1130531555 is 5551350311.

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 1130531555 - 2¹⁸ = 1130269411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1130531557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150569 + ... + 157898.

It is an arithmetic number, because the mean of its divisors is an integer number (169811634).

Almost surely, 2^1130531555 is an apocalyptic number.

1130531555 is a deficient number, since it is larger than the sum of its proper divisors (227961517).

1130531555 is an equidigital number, since it uses as much as digits as its factorization.

1130531555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309205.

The product of its (nonzero) digits is 5625, while the sum is 29.

The square root of 1130531555 is about 33623.3781021479. The cubic root of 1130531555 is about 1041.7437324387.

Adding to 1130531555 its reverse (5551350311), we get a palindrome (6681881866).

The spelling of 1130531555 in words is "one billion, one hundred thirty million, five hundred thirty-one thousand, five hundred fifty-five".