1155520550 has 12 divisors (see below), whose sum is σ = 2149268316. Its totient is φ = 462208200.

The previous prime is 1155520547. The next prime is 1155520571. The reversal of 1155520550 is 550255511.

1155520550 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11555156 + ... + 11555255.

It is an arithmetic number, because the mean of its divisors is an integer number (179105693).

Almost surely, 2^1155520550 is an apocalyptic number.

1155520550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155520550 is a deficient number, since it is larger than the sum of its proper divisors (993747766).

1155520550 is a wasteful number, since it uses less digits than its factorization.

1155520550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23110423 (or 23110418 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 1155520550 is about 33992.9485334826. The cubic root of 1155520550 is about 1049.3633479915.

The spelling of 1155520550 in words is "one billion, one hundred fifty-five million, five hundred twenty thousand, five hundred fifty".