2118201550 has 24 divisors (see below), whose sum is σ = 3955574952. Its totient is φ = 843900000.

The previous prime is 2118201541. The next prime is 2118201559. The reversal of 2118201550 is 551028112.

It is an interprime number because it is at equal distance from previous prime (2118201541) and next prime (2118201559).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118201559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71841 + ... + 96940.

It is an arithmetic number, because the mean of its divisors is an integer number (164815623).

Almost surely, 2^2118201550 is an apocalyptic number.

2118201550 is a deficient number, since it is larger than the sum of its proper divisors (1837373402).

2118201550 is a wasteful number, since it uses less digits than its factorization.

2118201550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169044 (or 169039 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 2118201550 is about 46023.9236701957. The cubic root of 2118201550 is about 1284.2682930236.

Adding to 2118201550 its reverse (551028112), we get a palindrome (2669229662).

The spelling of 2118201550 in words is "two billion, one hundred eighteen million, two hundred one thousand, five hundred fifty".