2156110220 has 48 divisors (see below), whose sum is σ = 4944125088. Its totient is φ = 783298560.

The previous prime is 2156110199. The next prime is 2156110237. The reversal of 2156110220 is 220116512.

It is a super-2 number, since 2×2156110220² = 9297622561576896800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2156110192 and 2156110201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263714 + ... + 271766.

It is an arithmetic number, because the mean of its divisors is an integer number (103002606).

Almost surely, 2^2156110220 is an apocalyptic number.

2156110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2156110220 is an abundant number, since it is smaller than the sum of its proper divisors (2788014868).

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

2156110220 is a wasteful number, since it uses less digits than its factorization.

2156110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9290 (or 9288 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2156110220 is about 46433.9339276784. The cubic root of 2156110220 is about 1291.8843961973.

Adding to 2156110220 its reverse (220116512), we get a palindrome (2376226732).

The spelling of 2156110220 in words is "two billion, one hundred fifty-six million, one hundred ten thousand, two hundred twenty".