509422081 has 6 divisors (see below), whose sum is σ = 592593090. Its totient is φ = 436647456.

The previous prime is 509422079. The next prime is 509422087. The reversal of 509422081 is 180224905.

It can be written as a sum of positive squares in only one way, i.e., 474847681 + 34574400 = 21791^2 + 5880^2 .

It is not a de Polignac number, because 509422081 - 2¹ = 509422079 is a prime.

It is a super-2 number, since 2×509422081² = 519021713220741122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509422087) 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 in 5 ways as a sum of consecutive naturals, for example, 5198136 + ... + 5198233.

It is an arithmetic number, because the mean of its divisors is an integer number (98765515).

Almost surely, 2^509422081 is an apocalyptic number.

It is an amenable number.

509422081 is a deficient number, since it is larger than the sum of its proper divisors (83171009).

509422081 is a wasteful number, since it uses less digits than its factorization.

509422081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10396383 (or 10396376 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 509422081 is about 22570.3806126525. The cubic root of 509422081 is about 798.6550740891.

Adding to 509422081 its reverse (180224905), we get a palindrome (689646986).

The spelling of 509422081 in words is "five hundred nine million, four hundred twenty-two thousand, eighty-one".