1151222500 has 60 divisors (see below), whose sum is σ = 2559102700. Its totient is φ = 452880000.

The previous prime is 1151222497. The next prime is 1151222557. The reversal of 1151222500 is 52221511.

It can be written as a sum of positive squares in 10 ways, for example, as 989983296 + 161239204 = 31464^2 + 12698^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 148726 + ... + 156274.

Almost surely, 2^1151222500 is an apocalyptic number.

1151222500 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 1151222500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279551350).

1151222500 is an abundant number, since it is smaller than the sum of its proper divisors (1407880200).

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

1151222500 is an equidigital number, since it uses as much as digits as its factorization.

1151222500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7634 (or 7617 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1151222500 is about 33929.6699070297. The cubic root of 1151222500 is about 1048.0606682145.

The spelling of 1151222500 in words is "one billion, one hundred fifty-one million, two hundred twenty-two thousand, five hundred".