1165225500 has 120 divisors (see below), whose sum is σ = 3801701904. Its totient is φ = 310716000.

The previous prime is 1165225447. The next prime is 1165225513. The reversal of 1165225500 is 55225611.

1165225500 is a `hidden beast` number, since 1 + 1 + 652 + 2 + 5 + 5 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 26115 + ... + 54885.

Almost surely, 2^1165225500 is an apocalyptic number.

1165225500 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 1165225500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1900850952).

1165225500 is an abundant number, since it is smaller than the sum of its proper divisors (2636476404).

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

1165225500 is a wasteful number, since it uses less digits than its factorization.

1165225500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28802 (or 28781 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1165225500 is about 34135.3995142872. The cubic root of 1165225500 is about 1052.2929482894.

The spelling of 1165225500 in words is "one billion, one hundred sixty-five million, two hundred twenty-five thousand, five hundred".