509650481 has 4 divisors (see below), whose sum is σ = 509699172. Its totient is φ = 509601792.

The previous prime is 509650439. The next prime is 509650483. The reversal of 509650481 is 184056905.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 184056905 = 5 ⋅36811381.

It can be written as a sum of positive squares in 2 ways, for example, as 129595456 + 380055025 = 11384^2 + 19495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509650481 is a prime.

It is a super-2 number, since 2×509650481² = 519487225567062722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (509650483) 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 3 ways as a sum of consecutive naturals, for example, 1496 + ... + 31961.

It is an arithmetic number, because the mean of its divisors is an integer number (127424793).

Almost surely, 2^509650481 is an apocalyptic number.

It is an amenable number.

509650481 is a deficient number, since it is larger than the sum of its proper divisors (48691).

509650481 is a wasteful number, since it uses less digits than its factorization.

509650481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48690.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 509650481 is about 22575.4397742325. The cubic root of 509650481 is about 798.7744155748.

The spelling of 509650481 in words is "five hundred nine million, six hundred fifty thousand, four hundred eighty-one".