2155550515 has 8 divisors (see below), whose sum is σ = 2589200208. Its totient is φ = 1722747360.

The previous prime is 2155550503. The next prime is 2155550533. The reversal of 2155550515 is 5150555512.

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

It is not a de Polignac number, because 2155550515 - 2¹¹ = 2155548467 is a prime.

It is a Duffinian 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, 206017 + ... + 216226.

It is an arithmetic number, because the mean of its divisors is an integer number (323650026).

Almost surely, 2^2155550515 is an apocalyptic number.

2155550515 is a deficient number, since it is larger than the sum of its proper divisors (433649693).

2155550515 is a wasteful number, since it uses less digits than its factorization.

2155550515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423269.

The product of its (nonzero) digits is 31250, while the sum is 34.

The square root of 2155550515 is about 46427.9066402956. The cubic root of 2155550515 is about 1291.7725996967.

The spelling of 2155550515 in words is "two billion, one hundred fifty-five million, five hundred fifty thousand, five hundred fifteen".