2161032144 has 40 divisors (see below), whose sum is σ = 5585794272. Its totient is φ = 719940480.

The previous prime is 2161032143. The next prime is 2161032161. The reversal of 2161032144 is 4412301612.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161032143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81139 + ... + 104429.

Almost surely, 2^2161032144 is an apocalyptic number.

2161032144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2161032144 is an abundant number, since it is smaller than the sum of its proper divisors (3424762128).

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

2161032144 is a wasteful number, since it uses less digits than its factorization.

2161032144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25235 (or 25229 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2161032144 is about 46486.9029297500. The cubic root of 2161032144 is about 1292.8666781618.

Adding to 2161032144 its reverse (4412301612), we get a palindrome (6573333756).

The spelling of 2161032144 in words is "two billion, one hundred sixty-one million, thirty-two thousand, one hundred forty-four".