2523123221 has 24 divisors (see below), whose sum is σ = 2916981720. Its totient is φ = 2171990016.

The previous prime is 2523123217. The next prime is 2523123223. The reversal of 2523123221 is 1223213252.

2523123221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1576884100 + 946239121 = 39710^2 + 30761^2 .

It is not a de Polignac number, because 2523123221 - 2² = 2523123217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2523123223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170885 + ... + 185061.

It is an arithmetic number, because the mean of its divisors is an integer number (121540905).

Almost surely, 2^2523123221 is an apocalyptic number.

It is an amenable number.

2523123221 is a deficient number, since it is larger than the sum of its proper divisors (393858499).

2523123221 is a wasteful number, since it uses less digits than its factorization.

2523123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261 (or 14242 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 2523123221 is about 50230.6999851684. The cubic root of 2523123221 is about 1361.3803784882.

Adding to 2523123221 its reverse (1223213252), we get a palindrome (3746336473).

The spelling of 2523123221 in words is "two billion, five hundred twenty-three million, one hundred twenty-three thousand, two hundred twenty-one".