2542525221 has 4 divisors (see below), whose sum is σ = 3390033632. Its totient is φ = 1695016812.

The previous prime is 2542525157. The next prime is 2542525229. The reversal of 2542525221 is 1225252452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2542525221 - 2⁶ = 2542525157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542525229) 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, 423754201 + ... + 423754206.

It is an arithmetic number, because the mean of its divisors is an integer number (847508408).

Almost surely, 2^2542525221 is an apocalyptic number.

It is an amenable number.

2542525221 is a deficient number, since it is larger than the sum of its proper divisors (847508411).

2542525221 is an equidigital number, since it uses as much as digits as its factorization.

2542525221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847508410.

The product of its digits is 16000, while the sum is 30.

The square root of 2542525221 is about 50423.4590344613. The cubic root of 2542525221 is about 1364.8609967269.

Adding to 2542525221 its reverse (1225252452), we get a palindrome (3767777673).

The spelling of 2542525221 in words is "two billion, five hundred forty-two million, five hundred twenty-five thousand, two hundred twenty-one".