502385561 has 2 divisors, whose sum is σ = 502385562. Its totient is φ = 502385560.

The previous prime is 502385551. The next prime is 502385567. The reversal of 502385561 is 165583205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494795536 + 7590025 = 22244^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 502385561 - 2¹⁸ = 502123417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (502385567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251192780 + 251192781.

It is an arithmetic number, because the mean of its divisors is an integer number (251192781).

Almost surely, 2^502385561 is an apocalyptic number.

It is an amenable number.

502385561 is a deficient number, since it is larger than the sum of its proper divisors (1).

502385561 is an equidigital number, since it uses as much as digits as its factorization.

502385561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 502385561 is about 22413.9590657251. The cubic root of 502385561 is about 794.9608044703.

The spelling of 502385561 in words is "five hundred two million, three hundred eighty-five thousand, five hundred sixty-one".