1155303215 has 16 divisors (see below), whose sum is σ = 1529396640. Its totient is φ = 830776320.

The previous prime is 1155303203. The next prime is 1155303241. The reversal of 1155303215 is 5123035511.

It is a happy number.

It is not a de Polignac number, because 1155303215 - 2⁴ = 1155303199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113114 + ... + 122903.

It is an arithmetic number, because the mean of its divisors is an integer number (95587290).

Almost surely, 2^1155303215 is an apocalyptic number.

1155303215 is a deficient number, since it is larger than the sum of its proper divisors (374093425).

1155303215 is a wasteful number, since it uses less digits than its factorization.

1155303215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236122.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1155303215 is about 33989.7516172154. The cubic root of 1155303215 is about 1049.2975543590.

Adding to 1155303215 its reverse (5123035511), we get a palindrome (6278338726).

The spelling of 1155303215 in words is "one billion, one hundred fifty-five million, three hundred three thousand, two hundred fifteen".