1155231300 has 72 divisors (see below), whose sum is σ = 3350091136. Its totient is φ = 307359360.

The previous prime is 1155231289. The next prime is 1155231307. The reversal of 1155231300 is 31325511.

It is not an unprimeable number, because it can be changed into a prime (1155231307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134742 + ... + 143058.

Almost surely, 2^1155231300 is an apocalyptic number.

1155231300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155231300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1675045568).

1155231300 is an abundant number, since it is smaller than the sum of its proper divisors (2194859836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155231300 is a wasteful number, since it uses less digits than its factorization.

1155231300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8797 (or 8790 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1155231300 is about 33988.6937083495. The cubic root of 1155231300 is about 1049.2757817778.

Adding to 1155231300 its reverse (31325511), we get a palindrome (1186556811).

The spelling of 1155231300 in words is "one billion, one hundred fifty-five million, two hundred thirty-one thousand, three hundred".