2523890021 has 2 divisors, whose sum is σ = 2523890022. Its totient is φ = 2523890020.

The previous prime is 2523890009. The next prime is 2523890059. The reversal of 2523890021 is 1200983252.

It is a happy number.

2523890021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1590892996 + 932997025 = 39886^2 + 30545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2523890021 - 2⁶ = 2523889957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2523890021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2523890221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1261945010 + 1261945011.

It is an arithmetic number, because the mean of its divisors is an integer number (1261945011).

Almost surely, 2^2523890021 is an apocalyptic number.

It is an amenable number.

2523890021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2523890021 is an equidigital number, since it uses as much as digits as its factorization.

2523890021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2523890021 is about 50238.3321876831. The cubic root of 2523890021 is about 1361.5182764622.

The spelling of 2523890021 in words is "two billion, five hundred twenty-three million, eight hundred ninety thousand, twenty-one".