610505521 has 2 divisors, whose sum is σ = 610505522. Its totient is φ = 610505520.

The previous prime is 610505503. The next prime is 610505551. The reversal of 610505521 is 125505016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608362225 + 2143296 = 24665^2 + 1464^2 .

It is a cyclic number.

It is not a de Polignac number, because 610505521 - 2⁷ = 610505393 is a prime.

It is not a weakly prime, because it can be changed into another prime (610505551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305252760 + 305252761.

It is an arithmetic number, because the mean of its divisors is an integer number (305252761).

Almost surely, 2^610505521 is an apocalyptic number.

It is an amenable number.

610505521 is a deficient number, since it is larger than the sum of its proper divisors (1).

610505521 is an equidigital number, since it uses as much as digits as its factorization.

610505521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 610505521 is about 24708.4099245581. The cubic root of 610505521 is about 848.3268220979.

The spelling of 610505521 in words is "six hundred ten million, five hundred five thousand, five hundred twenty-one".