1153115220 has 24 divisors (see below), whose sum is σ = 3228722784. Its totient is φ = 307497376.

The previous prime is 1153115213. The next prime is 1153115221. The reversal of 1153115220 is 225113511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1153115221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9609234 + ... + 9609353.

It is an arithmetic number, because the mean of its divisors is an integer number (134530116).

Almost surely, 2^1153115220 is an apocalyptic number.

1153115220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1153115220 is an abundant number, since it is smaller than the sum of its proper divisors (2075607564).

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

1153115220 is a wasteful number, since it uses less digits than its factorization.

1153115220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19218599 (or 19218597 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1153115220 is about 33957.5502650000. The cubic root of 1153115220 is about 1048.6347244190.

Adding to 1153115220 its reverse (225113511), we get a palindrome (1378228731).

The spelling of 1153115220 in words is "one billion, one hundred fifty-three million, one hundred fifteen thousand, two hundred twenty".