2155052004 has 96 divisors (see below), whose sum is σ = 5922637056. Its totient is φ = 597073920.

The previous prime is 2155051949. The next prime is 2155052021. The reversal of 2155052004 is 4002505512.

It is a happy number.

2155052004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 594004 + ... + 597620.

It is an arithmetic number, because the mean of its divisors is an integer number (61694136).

Almost surely, 2^2155052004 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 2155052004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2961318528).

2155052004 is an abundant number, since it is smaller than the sum of its proper divisors (3767585052).

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

2155052004 is a wasteful number, since it uses less digits than its factorization.

2155052004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845 (or 3843 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 2155052004 is about 46422.5376729881. The cubic root of 2155052004 is about 1291.6730099020.

Adding to 2155052004 its reverse (4002505512), we get a palindrome (6157557516).

The spelling of 2155052004 in words is "two billion, one hundred fifty-five million, fifty-two thousand, four".