2525229821 has 2 divisors, whose sum is σ = 2525229822. Its totient is φ = 2525229820.

The previous prime is 2525229779. The next prime is 2525229859. The reversal of 2525229821 is 1289225252.

It is an a-pointer prime, because the next prime (2525229859) can be obtained adding 2525229821 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2351280100 + 173949721 = 48490^2 + 13189^2 .

It is a cyclic number.

It is not a de Polignac number, because 2525229821 - 2⁶ = 2525229757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2525229881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262614910 + 1262614911.

It is an arithmetic number, because the mean of its divisors is an integer number (1262614911).

Almost surely, 2^2525229821 is an apocalyptic number.

It is an amenable number.

2525229821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2525229821 is an equidigital number, since it uses as much as digits as its factorization.

2525229821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 38.

The square root of 2525229821 is about 50251.6648579925. The cubic root of 2525229821 is about 1361.7591532414.

The spelling of 2525229821 in words is "two billion, five hundred twenty-five million, two hundred twenty-nine thousand, eight hundred twenty-one".