2125444521 has 8 divisors (see below), whose sum is σ = 2836523200. Its totient is φ = 1415664432.

The previous prime is 2125444471. The next prime is 2125444523. The reversal of 2125444521 is 1254445212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2125444521 - 2⁷ = 2125444393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125444523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320821 + ... + 327378.

It is an arithmetic number, because the mean of its divisors is an integer number (354565400).

Almost surely, 2^2125444521 is an apocalyptic number.

It is an amenable number.

2125444521 is a deficient number, since it is larger than the sum of its proper divisors (711078679).

2125444521 is a wasteful number, since it uses less digits than its factorization.

2125444521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649295.

The product of its digits is 12800, while the sum is 30.

The square root of 2125444521 is about 46102.5435415444. The cubic root of 2125444521 is about 1285.7304352486.

Adding to 2125444521 its reverse (1254445212), we get a palindrome (3379889733).

The spelling of 2125444521 in words is "two billion, one hundred twenty-five million, four hundred forty-four thousand, five hundred twenty-one".