228214309 has 4 divisors (see below), whose sum is σ = 228479616. Its totient is φ = 227949004.

The previous prime is 228214291. The next prime is 228214333. The reversal of 228214309 is 903412822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228214309 - 2²³ = 219825701 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 (228217309) 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, 131359 + ... + 133084.

It is an arithmetic number, because the mean of its divisors is an integer number (57119904).

Almost surely, 2^228214309 is an apocalyptic number.

It is an amenable number.

228214309 is a deficient number, since it is larger than the sum of its proper divisors (265307).

228214309 is an equidigital number, since it uses as much as digits as its factorization.

228214309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265306.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 228214309 is about 15106.7636838603. The cubic root of 228214309 is about 611.1028235925.

The spelling of 228214309 in words is "two hundred twenty-eight million, two hundred fourteen thousand, three hundred nine".