1155155000 has 40 divisors (see below), whose sum is σ = 2706539880. Its totient is φ = 462060000.

The previous prime is 1155154997. The next prime is 1155155009. The reversal of 1155155000 is 5515511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155155009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 110516 + ... + 120515.

It is an arithmetic number, because the mean of its divisors is an integer number (67663497).

Almost surely, 2^1155155000 is an apocalyptic number.

1155155000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155155000 is an abundant number, since it is smaller than the sum of its proper divisors (1551384880).

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

1155155000 is an equidigital number, since it uses as much as digits as its factorization.

1155155000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231057 (or 231038 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 23.

The square root of 1155155000 is about 33987.5712577407. The cubic root of 1155155000 is about 1049.2526806306.

The spelling of 1155155000 in words is "one billion, one hundred fifty-five million, one hundred fifty-five thousand".