227220309 has 12 divisors (see below), whose sum is σ = 340363296. Its totient is φ = 151480044.

The previous prime is 227220277. The next prime is 227220313. The reversal of 227220309 is 903022722.

It is not a de Polignac number, because 227220309 - 2⁵ = 227220277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227220349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 467289 + ... + 467774.

It is an arithmetic number, because the mean of its divisors is an integer number (28363608).

Almost surely, 2^227220309 is an apocalyptic number.

It is an amenable number.

227220309 is a deficient number, since it is larger than the sum of its proper divisors (113142987).

227220309 is an frugal number, since it uses more digits than its factorization.

227220309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935078 (or 935066 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 227220309 is about 15073.8286112056. The cubic root of 227220309 is about 610.2143016636.

It can be divided in two parts, 227220 and 309, that added together give a square (227529 = 477²).

The spelling of 227220309 in words is "two hundred twenty-seven million, two hundred twenty thousand, three hundred nine".