2118319551 has 24 divisors (see below), whose sum is σ = 3093439440. Its totient is φ = 1396763136.

The previous prime is 2118319543. The next prime is 2118319607. The reversal of 2118319551 is 1559138112.

2118319551 is a `hidden beast` number, since 2 + 11 + 83 + 19 + 551 = 666.

It is not a de Polignac number, because 2118319551 - 2³ = 2118319543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118319501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343471 + ... + 349583.

It is an arithmetic number, because the mean of its divisors is an integer number (128893310).

Almost surely, 2^2118319551 is an apocalyptic number.

2118319551 is a deficient number, since it is larger than the sum of its proper divisors (975119889).

2118319551 is a wasteful number, since it uses less digits than its factorization.

2118319551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6535 (or 6532 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The square root of 2118319551 is about 46025.2056051899. The cubic root of 2118319551 is about 1284.2921406329.

The spelling of 2118319551 in words is "two billion, one hundred eighteen million, three hundred nineteen thousand, five hundred fifty-one".