228279277 has 2 divisors, whose sum is σ = 228279278. Its totient is φ = 228279276.

The previous prime is 228279253. The next prime is 228279343. The reversal of 228279277 is 772972822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159289641 + 68989636 = 12621^2 + 8306^2 .

It is a cyclic number.

It is not a de Polignac number, because 228279277 - 2¹⁵ = 228246509 is a prime.

It is a super-2 number, since 2×228279277² = 104222856615285458, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228259277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114139638 + 114139639.

It is an arithmetic number, because the mean of its divisors is an integer number (114139639).

Almost surely, 2^228279277 is an apocalyptic number.

It is an amenable number.

228279277 is a deficient number, since it is larger than the sum of its proper divisors (1).

228279277 is an equidigital number, since it uses as much as digits as its factorization.

228279277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 46.

The square root of 228279277 is about 15108.9138259506. The cubic root of 228279277 is about 611.1608076304.

The spelling of 228279277 in words is "two hundred twenty-eight million, two hundred seventy-nine thousand, two hundred seventy-seven".