1155231250 has 24 divisors (see below), whose sum is σ = 2165931684. Its totient is φ = 462090000.

The previous prime is 1155231241. The next prime is 1155231251. The reversal of 1155231250 is 521325511.

It can be written as a sum of positive squares in 6 ways, for example, as 467900161 + 687331089 = 21631^2 + 26217^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1155231251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86169 + ... + 98668.

Almost surely, 2^1155231250 is an apocalyptic number.

1155231250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155231250 is a deficient number, since it is larger than the sum of its proper divisors (1010700434).

1155231250 is an frugal number, since it uses more digits than its factorization.

1155231250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184864 (or 184844 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1155231250 is about 33988.6929728108. The cubic root of 1155231250 is about 1049.2757666397.

Adding to 1155231250 its reverse (521325511), we get a palindrome (1676556761).

It can be divided in two parts, 11552 and 31250, that multiplied together give a square (361000000 = 19000²).

The spelling of 1155231250 in words is "one billion, one hundred fifty-five million, two hundred thirty-one thousand, two hundred fifty".