2161453000 has 128 divisors (see below), whose sum is σ = 5863104000. Its totient is φ = 730464000.

The previous prime is 2161452941. The next prime is 2161453001. The reversal of 2161453000 is 3541612.

It is not an unprimeable number, because it can be changed into a prime (2161453001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494826 + ... + 499174.

It is an arithmetic number, because the mean of its divisors is an integer number (45805500).

Almost surely, 2^2161453000 is an apocalyptic number.

2161453000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161453000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2931552000).

2161453000 is an abundant number, since it is smaller than the sum of its proper divisors (3701651000).

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

2161453000 is a wasteful number, since it uses less digits than its factorization.

2161453000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448 (or 4434 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2161453000 is about 46491.4293176710. The cubic root of 2161453000 is about 1292.9506003102.

Adding to 2161453000 its reverse (3541612), we get a palindrome (2164994612).

The spelling of 2161453000 in words is "two billion, one hundred sixty-one million, four hundred fifty-three thousand".