2155218095 has 32 divisors (see below), whose sum is σ = 2812936896. Its totient is φ = 1578803200.

The previous prime is 2155218019. The next prime is 2155218101. The reversal of 2155218095 is 5908125512.

It is a happy number.

It is not a de Polignac number, because 2155218095 - 2²⁴ = 2138440879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1815092 + ... + 1816278.

It is an arithmetic number, because the mean of its divisors is an integer number (87904278).

Almost surely, 2^2155218095 is an apocalyptic number.

2155218095 is a deficient number, since it is larger than the sum of its proper divisors (657718801).

2155218095 is a wasteful number, since it uses less digits than its factorization.

2155218095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 2155218095 is about 46424.3265433113. The cubic root of 2155218095 is about 1291.7061923574.

The spelling of 2155218095 in words is "two billion, one hundred fifty-five million, two hundred eighteen thousand, ninety-five".