2155218134 has 8 divisors (see below), whose sum is σ = 3233711808. Its totient is φ = 1077314200.

The previous prime is 2155218133. The next prime is 2155218137. The reversal of 2155218134 is 4318125512.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2155218134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155218133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138182 + ... + 152985.

It is an arithmetic number, because the mean of its divisors is an integer number (404213976).

Almost surely, 2^2155218134 is an apocalyptic number.

2155218134 is a deficient number, since it is larger than the sum of its proper divisors (1078493674).

2155218134 is a wasteful number, since it uses less digits than its factorization.

2155218134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294870.

The product of its digits is 9600, while the sum is 32.

The square root of 2155218134 is about 46424.3269633497. The cubic root of 2155218134 is about 1291.7062001488.

The spelling of 2155218134 in words is "two billion, one hundred fifty-five million, two hundred eighteen thousand, one hundred thirty-four".