2102450561 has 2 divisors, whose sum is σ = 2102450562. Its totient is φ = 2102450560.

The previous prime is 2102450549. The next prime is 2102450563. The reversal of 2102450561 is 1650542012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1602480961 + 499969600 = 40031^2 + 22360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102450561 is a prime.

It is a super-2 number, since 2×2102450561² = 8840596722898429442, which contains 22 as substring.

Together with 2102450563, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2102450561.

It is not a weakly prime, because it can be changed into another prime (2102450563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051225280 + 1051225281.

It is an arithmetic number, because the mean of its divisors is an integer number (1051225281).

Almost surely, 2^2102450561 is an apocalyptic number.

It is an amenable number.

2102450561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102450561 is an equidigital number, since it uses as much as digits as its factorization.

2102450561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2102450561 is about 45852.4869663577. The cubic root of 2102450561 is about 1281.0770883976.

Adding to 2102450561 its reverse (1650542012), we get a palindrome (3752992573).

The spelling of 2102450561 in words is "two billion, one hundred two million, four hundred fifty thousand, five hundred sixty-one".