2161304004 has 48 divisors (see below), whose sum is σ = 5240793600. Its totient is φ = 692497920.

The previous prime is 2161303961. The next prime is 2161304011. The reversal of 2161304004 is 4004031612.

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, 35932 + ... + 74924.

It is an arithmetic number, because the mean of its divisors is an integer number (109183200).

Almost surely, 2^2161304004 is an apocalyptic number.

It is an amenable number.

2161304004 is an abundant number, since it is smaller than the sum of its proper divisors (3079489596).

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

2161304004 is a wasteful number, since it uses less digits than its factorization.

2161304004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39180 (or 39178 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2161304004 is about 46489.8268871804. The cubic root of 2161304004 is about 1292.9208905279.

Adding to 2161304004 its reverse (4004031612), we get a palindrome (6165335616).

The spelling of 2161304004 in words is "two billion, one hundred sixty-one million, three hundred four thousand, four".