2504525221 has 16 divisors (see below), whose sum is σ = 2963495808. Its totient is φ = 2090636800.

The previous prime is 2504525209. The next prime is 2504525263. The reversal of 2504525221 is 1225254052.

It is a cyclic number.

It is not a de Polignac number, because 2504525221 - 2¹¹ = 2504523173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2504525221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2504525281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155665 + ... + 170998.

It is an arithmetic number, because the mean of its divisors is an integer number (185218488).

Almost surely, 2^2504525221 is an apocalyptic number.

It is an amenable number.

2504525221 is a deficient number, since it is larger than the sum of its proper divisors (458970587).

2504525221 is a wasteful number, since it uses less digits than its factorization.

2504525221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326732.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 2504525221 is about 50045.2317508871. The cubic root of 2504525221 is about 1358.0272040131.

Adding to 2504525221 its reverse (1225254052), we get a palindrome (3729779273).

It can be divided in two parts, 2504 and 525221, that added together give a palindrome (527725).

The spelling of 2504525221 in words is "two billion, five hundred four million, five hundred twenty-five thousand, two hundred twenty-one".