2155218104 has 16 divisors (see below), whose sum is σ = 4351882920. Its totient is φ = 994716000.

The previous prime is 2155218101. The next prime is 2155218119. The reversal of 2155218104 is 4018125512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155218101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10361522 + ... + 10361729.

Almost surely, 2^2155218104 is an apocalyptic number.

It is an amenable number.

2155218104 is an abundant number, since it is smaller than the sum of its proper divisors (2196664816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155218104 is a wasteful number, since it uses less digits than its factorization.

2155218104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20723270 (or 20723266 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 2155218104 is about 46424.3266402433. The cubic root of 2155218104 is about 1291.7061941554.

The spelling of 2155218104 in words is "two billion, one hundred fifty-five million, two hundred eighteen thousand, one hundred four".