509450561 has 4 divisors (see below), whose sum is σ = 509496624. Its totient is φ = 509404500.

The previous prime is 509450537. The next prime is 509450587. The reversal of 509450561 is 165054905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 509450561 - 2¹⁰ = 509449537 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509453561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4646 + ... + 32256.

It is an arithmetic number, because the mean of its divisors is an integer number (127374156).

Almost surely, 2^509450561 is an apocalyptic number.

It is an amenable number.

509450561 is a deficient number, since it is larger than the sum of its proper divisors (46063).

509450561 is a wasteful number, since it uses less digits than its factorization.

509450561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46062.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 509450561 is about 22571.0115192031. The cubic root of 509450561 is about 798.6699571455.

It can be divided in two parts, 5094 and 50561, that added together give a palindrome (55655).

The spelling of 509450561 in words is "five hundred nine million, four hundred fifty thousand, five hundred sixty-one".