1155215255 has 8 divisors (see below), whose sum is σ = 1408984224. Its totient is φ = 909021600.

The previous prime is 1155215251. The next prime is 1155215287. The reversal of 1155215255 is 5525125511.

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

It is not a de Polignac number, because 1155215255 - 2² = 1155215251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155215251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1893491 + ... + 1894100.

It is an arithmetic number, because the mean of its divisors is an integer number (176123028).

Almost surely, 2^1155215255 is an apocalyptic number.

1155215255 is a deficient number, since it is larger than the sum of its proper divisors (253768969).

1155215255 is an equidigital number, since it uses as much as digits as its factorization.

1155215255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787657.

The product of its digits is 12500, while the sum is 32.

The square root of 1155215255 is about 33988.4576731572. The cubic root of 1155215255 is about 1049.2709239604.

The spelling of 1155215255 in words is "one billion, one hundred fifty-five million, two hundred fifteen thousand, two hundred fifty-five".