2116111500 has 96 divisors (see below), whose sum is σ = 6846840000. Its totient is φ = 564292800.

The previous prime is 2116111493. The next prime is 2116111507. The reversal of 2116111500 is 51116112.

It is a happy number.

2116111500 is a `hidden beast` number, since 2 + 1 + 1 + 611 + 1 + 50 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2116111493) and next prime (2116111507).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2116111507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64875 + ... + 91874.

It is an arithmetic number, because the mean of its divisors is an integer number (71321250).

Almost surely, 2^2116111500 is an apocalyptic number.

2116111500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2116111500 is an abundant number, since it is smaller than the sum of its proper divisors (4730728500).

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

2116111500 is a wasteful number, since it uses less digits than its factorization.

2116111500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156777 (or 156759 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 18.

The square root of 2116111500 is about 46001.2119405565. The cubic root of 2116111500 is about 1283.8457540278.

Adding to 2116111500 its reverse (51116112), we get a palindrome (2167227612).

The spelling of 2116111500 in words is "two billion, one hundred sixteen million, one hundred eleven thousand, five hundred".