2155234518 has 12 divisors (see below), whose sum is σ = 4669674828. Its totient is φ = 718411500.

The previous prime is 2155234511. The next prime is 2155234531. The reversal of 2155234518 is 8154325512.

2155234518 is a `hidden beast` number, since 21 + 552 + 34 + 51 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155234511) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 59867608 + ... + 59867643.

It is an arithmetic number, because the mean of its divisors is an integer number (389139569).

Almost surely, 2^2155234518 is an apocalyptic number.

2155234518 is an abundant number, since it is smaller than the sum of its proper divisors (2514440310).

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

2155234518 is a wasteful number, since it uses less digits than its factorization.

2155234518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119735259 (or 119735256 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 2155234518 is about 46424.5034222231. The cubic root of 2155234518 is about 1291.7094733303.

The spelling of 2155234518 in words is "two billion, one hundred fifty-five million, two hundred thirty-four thousand, five hundred eighteen".