2161568 has 24 divisors (see below), whose sum is σ = 4394880. Its totient is φ = 1045440.

The previous prime is 2161553. The next prime is 2161571. The reversal of 2161568 is 8651612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2161568.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98 + ... + 2081.

It is an arithmetic number, because the mean of its divisors is an integer number (183120).

2^2161568 is an apocalyptic number.

It is an amenable number.

2161568 is an abundant number, since it is smaller than the sum of its proper divisors (2233312).

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

2161568 is a wasteful number, since it uses less digits than its factorization.

2161568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220 (or 2212 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 2161568 is about 1470.2271933276. The cubic root of 2161568 is about 129.2973530361.

The spelling of 2161568 in words is "two million, one hundred sixty-one thousand, five hundred sixty-eight".