228212737 has 2 divisors, whose sum is σ = 228212738. Its totient is φ = 228212736.

The previous prime is 228212713. The next prime is 228212771. The reversal of 228212737 is 737212822.

It is a happy number.

It is an a-pointer prime, because the next prime (228212771) can be obtained adding 228212737 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212459776 + 15752961 = 14576^2 + 3969^2 .

It is a cyclic number.

It is not a de Polignac number, because 228212737 - 2¹⁹ = 227688449 is a prime.

It is not a weakly prime, because it can be changed into another prime (228212797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114106368 + 114106369.

It is an arithmetic number, because the mean of its divisors is an integer number (114106369).

It is a Proth number, since it is equal to 13929 ⋅ 2¹⁴ + 1 and 13929 < 2¹⁴.

Almost surely, 2^228212737 is an apocalyptic number.

It is an amenable number.

228212737 is a deficient number, since it is larger than the sum of its proper divisors (1).

228212737 is an equidigital number, since it uses as much as digits as its factorization.

228212737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 34.

The square root of 228212737 is about 15106.7116540960. The cubic root of 228212737 is about 611.1014204438.

The spelling of 228212737 in words is "two hundred twenty-eight million, two hundred twelve thousand, seven hundred thirty-seven".