1128131031 has 8 divisors (see below), whose sum is σ = 1540862064. Its totient is φ = 733743680.

The previous prime is 1128131029. The next prime is 1128131047. The reversal of 1128131031 is 1301318211.

It is a happy number.

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 1128131031 - 2¹ = 1128131029 is a prime.

It is a super-2 number, since 2×1128131031² = 2545359246210245922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1128130989 and 1128131007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128131131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4585776 + ... + 4586021.

It is an arithmetic number, because the mean of its divisors is an integer number (192607758).

Almost surely, 2^1128131031 is an apocalyptic number.

1128131031 is a deficient number, since it is larger than the sum of its proper divisors (412731033).

1128131031 is an equidigital number, since it uses as much as digits as its factorization.

1128131031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9171841.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1128131031 is about 33587.6618864725. The cubic root of 1128131031 is about 1041.0058780804.

Adding to 1128131031 its reverse (1301318211), we get a palindrome (2429449242).

The spelling of 1128131031 in words is "one billion, one hundred twenty-eight million, one hundred thirty-one thousand, thirty-one".