222804509 has 4 divisors (see below), whose sum is σ = 224223804. Its totient is φ = 221385216.

The previous prime is 222804479. The next prime is 222804521. The reversal of 222804509 is 905408222.

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 40284409 + 182520100 = 6347^2 + 13510^2 .

It is a cyclic number.

It is not a de Polignac number, because 222804509 - 2¹⁶ = 222738973 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 (222804539) 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, 709412 + ... + 709725.

It is an arithmetic number, because the mean of its divisors is an integer number (56055951).

Almost surely, 2^222804509 is an apocalyptic number.

It is an amenable number.

222804509 is a deficient number, since it is larger than the sum of its proper divisors (1419295).

222804509 is a wasteful number, since it uses less digits than its factorization.

222804509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419294.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 222804509 is about 14926.6375651049. The cubic root of 222804509 is about 606.2354455145.

The spelling of 222804509 in words is "two hundred twenty-two million, eight hundred four thousand, five hundred nine".