1155250215 has 96 divisors (see below), whose sum is σ = 2529869760. Its totient is φ = 497000448.

The previous prime is 1155250183. The next prime is 1155250219. The reversal of 1155250215 is 5120525511.

1155250215 is a `hidden beast` number, since 1 + 155 + 2 + 502 + 1 + 5 = 666.

1155250215 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1155250215 - 2⁵ = 1155250183 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155250219) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 107319 + ... + 117591.

It is an arithmetic number, because the mean of its divisors is an integer number (26352810).

Almost surely, 2^1155250215 is an apocalyptic number.

1155250215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155250215 is an abundant number, since it is smaller than the sum of its proper divisors (1374619545).

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

1155250215 is a wasteful number, since it uses less digits than its factorization.

1155250215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10318 (or 10305 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 1155250215 is about 33988.9719615054. The cubic root of 1155250215 is about 1049.2815084644.

Adding to 1155250215 its reverse (5120525511), we get a palindrome (6275775726).

The spelling of 1155250215 in words is "one billion, one hundred fifty-five million, two hundred fifty thousand, two hundred fifteen".