2181025104 has 40 divisors (see below), whose sum is σ = 5636371392. Its totient is φ = 726743040.

The previous prime is 2181025097. The next prime is 2181025111. The reversal of 2181025104 is 4015201812.

It is an interprime number because it is at equal distance from previous prime (2181025097) and next prime (2181025111).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159664 + ... + 172784.

Almost surely, 2^2181025104 is an apocalyptic number.

2181025104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2181025104 is an abundant number, since it is smaller than the sum of its proper divisors (3455346288).

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

2181025104 is a wasteful number, since it uses less digits than its factorization.

2181025104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16595 (or 16589 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 2181025104 is about 46701.4464872342. The cubic root of 2181025104 is about 1296.8414650439.

Adding to 2181025104 its reverse (4015201812), we get a palindrome (6196226916).

The spelling of 2181025104 in words is "two billion, one hundred eighty-one million, twenty-five thousand, one hundred four".