2581123120 has 40 divisors (see below), whose sum is σ = 6027359760. Its totient is φ = 1027933440.

The previous prime is 2581123099. The next prime is 2581123133. The reversal of 2581123120 is 213211852.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 52126 + ... + 88765.

It is an arithmetic number, because the mean of its divisors is an integer number (150683994).

Almost surely, 2^2581123120 is an apocalyptic number.

2581123120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2581123120 is an abundant number, since it is smaller than the sum of its proper divisors (3446236640).

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

2581123120 is a wasteful number, since it uses less digits than its factorization.

2581123120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141133 (or 141127 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 2581123120 is about 50804.7548955804. The cubic root of 2581123120 is about 1371.7329589328.

Adding to 2581123120 its reverse (213211852), we get a palindrome (2794334972).

The spelling of 2581123120 in words is "two billion, five hundred eighty-one million, one hundred twenty-three thousand, one hundred twenty".