509228861 has 8 divisors (see below), whose sum is σ = 538728000. Its totient is φ = 479999520.

The previous prime is 509228851. The next prime is 509228869. The reversal of 509228861 is 168822905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 509228861 - 2¹⁰ = 509227837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509228869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63560 + ... + 71121.

It is an arithmetic number, because the mean of its divisors is an integer number (67341000).

Almost surely, 2^509228861 is an apocalyptic number.

It is an amenable number.

509228861 is a deficient number, since it is larger than the sum of its proper divisors (29499139).

509228861 is a wasteful number, since it uses less digits than its factorization.

509228861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134899.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 509228861 is about 22566.0998180900. The cubic root of 509228861 is about 798.5540866803.

The spelling of 509228861 in words is "five hundred nine million, two hundred twenty-eight thousand, eight hundred sixty-one".