1155541215 has 8 divisors (see below), whose sum is σ = 1848865968. Its totient is φ = 616288640.

The previous prime is 1155541207. The next prime is 1155541223. The reversal of 1155541215 is 5121455511.

It is an interprime number because it is at equal distance from previous prime (1155541207) and next prime (1155541223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155541215 - 2³ = 1155541207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38518026 + ... + 38518055.

It is an arithmetic number, because the mean of its divisors is an integer number (231108246).

Almost surely, 2^1155541215 is an apocalyptic number.

1155541215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155541215 is a deficient number, since it is larger than the sum of its proper divisors (693324753).

1155541215 is an equidigital number, since it uses as much as digits as its factorization.

1155541215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77036089.

The product of its digits is 5000, while the sum is 30.

The square root of 1155541215 is about 33993.2524922226. The cubic root of 1155541215 is about 1049.3696034592.

Adding to 1155541215 its reverse (5121455511), we get a palindrome (6276996726).

The spelling of 1155541215 in words is "one billion, one hundred fifty-five million, five hundred forty-one thousand, two hundred fifteen".