2521228445 has 4 divisors (see below), whose sum is σ = 3025474140. Its totient is φ = 2016982752.

The previous prime is 2521228441. The next prime is 2521228453. The reversal of 2521228445 is 5448221252.

2521228445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 290838916 + 2230389529 = 17054^2 + 47227^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521228445 - 2² = 2521228441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521228441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252122840 + ... + 252122849.

It is an arithmetic number, because the mean of its divisors is an integer number (756368535).

Almost surely, 2^2521228445 is an apocalyptic number.

It is an amenable number.

2521228445 is a deficient number, since it is larger than the sum of its proper divisors (504245695).

2521228445 is an equidigital number, since it uses as much as digits as its factorization.

2521228445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504245694.

The product of its digits is 51200, while the sum is 35.

The square root of 2521228445 is about 50211.8357063352. The cubic root of 2521228445 is about 1361.0395103631.

Adding to 2521228445 its reverse (5448221252), we get a palindrome (7969449697).

The spelling of 2521228445 in words is "two billion, five hundred twenty-one million, two hundred twenty-eight thousand, four hundred forty-five".