2161441152 has 128 divisors (see below), whose sum is σ = 6870108000. Its totient is φ = 665044992.

The previous prime is 2161441147. The next prime is 2161441153. The reversal of 2161441152 is 2511441612.

2161441152 is a `hidden beast` number, since 2 + 1 + 614 + 41 + 1 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161441153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20874 + ... + 68982.

Almost surely, 2^2161441152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161441152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3435054000).

2161441152 is an abundant number, since it is smaller than the sum of its proper divisors (4708666848).

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

2161441152 is a wasteful number, since it uses less digits than its factorization.

2161441152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48145 (or 48127 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2161441152 is about 46491.3018961612. The cubic root of 2161441152 is about 1292.9482378706.

Adding to 2161441152 its reverse (2511441612), we get a palindrome (4672882764).

The spelling of 2161441152 in words is "two billion, one hundred sixty-one million, four hundred forty-one thousand, one hundred fifty-two".