492221509 has 4 divisors (see below), whose sum is σ = 530084716. Its totient is φ = 454358304.

The previous prime is 492221497. The next prime is 492221537. The reversal of 492221509 is 905122294.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 263153284 + 229068225 = 16222^2 + 15135^2 .

It is a cyclic number.

It is not a de Polignac number, because 492221509 - 2²⁷ = 358003781 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 (492221209) 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, 18931584 + ... + 18931609.

It is an arithmetic number, because the mean of its divisors is an integer number (132521179).

Almost surely, 2^492221509 is an apocalyptic number.

It is an amenable number.

492221509 is a deficient number, since it is larger than the sum of its proper divisors (37863207).

492221509 is a wasteful number, since it uses less digits than its factorization.

492221509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37863206.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 492221509 is about 22186.0656494116. The cubic root of 492221509 is about 789.5631345220.

The spelling of 492221509 in words is "four hundred ninety-two million, two hundred twenty-one thousand, five hundred nine".