2521245817 has 2 divisors, whose sum is σ = 2521245818. Its totient is φ = 2521245816.

The previous prime is 2521245791. The next prime is 2521245827. The reversal of 2521245817 is 7185421252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1328165136 + 1193080681 = 36444^2 + 34541^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521245817 - 2⁷ = 2521245689 is a prime.

It is not a weakly prime, because it can be changed into another prime (2521245827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260622908 + 1260622909.

It is an arithmetic number, because the mean of its divisors is an integer number (1260622909).

Almost surely, 2^2521245817 is an apocalyptic number.

It is an amenable number.

2521245817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521245817 is an equidigital number, since it uses as much as digits as its factorization.

2521245817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44800, while the sum is 37.

The square root of 2521245817 is about 50212.0086931403. The cubic root of 2521245817 is about 1361.0426363425.

The spelling of 2521245817 in words is "two billion, five hundred twenty-one million, two hundred forty-five thousand, eight hundred seventeen".