1155055215 has 16 divisors (see below), whose sum is σ = 1848988800. Its totient is φ = 615729312.

The previous prime is 1155055211. The next prime is 1155055219. The reversal of 1155055215 is 5125505511.

It is an interprime number because it is at equal distance from previous prime (1155055211) and next prime (1155055219).

It is not a de Polignac number, because 1155055215 - 2² = 1155055211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155055211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15016 + ... + 50354.

It is an arithmetic number, because the mean of its divisors is an integer number (115561800).

Almost surely, 2^1155055215 is an apocalyptic number.

1155055215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155055215 is a deficient number, since it is larger than the sum of its proper divisors (693933585).

1155055215 is a wasteful number, since it uses less digits than its factorization.

1155055215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37526.

The product of its (nonzero) digits is 6250, while the sum is 30.

The square root of 1155055215 is about 33986.1032629515. The cubic root of 1155055215 is about 1049.2224674576. Note that the first 3 decimals are identical.

The spelling of 1155055215 in words is "one billion, one hundred fifty-five million, fifty-five thousand, two hundred fifteen".