2161530110 has 32 divisors (see below), whose sum is σ = 4298743872. Its totient is φ = 778370560.

The previous prime is 2161530103. The next prime is 2161530143. The reversal of 2161530110 is 110351612.

2161530110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2161530110² = 9344424832873224200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 272501 + ... + 280320.

It is an arithmetic number, because the mean of its divisors is an integer number (134335746).

Almost surely, 2^2161530110 is an apocalyptic number.

2161530110 is a deficient number, since it is larger than the sum of its proper divisors (2137213762).

2161530110 is a wasteful number, since it uses less digits than its factorization.

2161530110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552868.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2161530110 is about 46492.2586029115. The cubic root of 2161530110 is about 1292.9659754977.

Adding to 2161530110 its reverse (110351612), we get a palindrome (2271881722).

The spelling of 2161530110 in words is "two billion, one hundred sixty-one million, five hundred thirty thousand, one hundred ten".