565061621 has 2 divisors, whose sum is σ = 565061622. Its totient is φ = 565061620.

The previous prime is 565061617. The next prime is 565061633. The reversal of 565061621 is 126160565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561216100 + 3845521 = 23690^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 565061621 - 2² = 565061617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (565061611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282530810 + 282530811.

It is an arithmetic number, because the mean of its divisors is an integer number (282530811).

Almost surely, 2^565061621 is an apocalyptic number.

It is an amenable number.

565061621 is a deficient number, since it is larger than the sum of its proper divisors (1).

565061621 is an equidigital number, since it uses as much as digits as its factorization.

565061621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 565061621 is about 23771.0248201461. The cubic root of 565061621 is about 826.7329942842.

The spelling of 565061621 in words is "five hundred sixty-five million, sixty-one thousand, six hundred twenty-one".