228228947 has 2 divisors, whose sum is σ = 228228948. Its totient is φ = 228228946.

The previous prime is 228228943. The next prime is 228228989. The reversal of 228228947 is 749822822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228228947 - 2² = 228228943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228228898 and 228228907.

It is not a weakly prime, because it can be changed into another prime (228228941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114114473 + 114114474.

It is an arithmetic number, because the mean of its divisors is an integer number (114114474).

Almost surely, 2^228228947 is an apocalyptic number.

228228947 is a deficient number, since it is larger than the sum of its proper divisors (1).

228228947 is an equidigital number, since it uses as much as digits as its factorization.

228228947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 44.

The square root of 228228947 is about 15107.2481610649. The cubic root of 228228947 is about 611.1158889899.

The spelling of 228228947 in words is "two hundred twenty-eight million, two hundred twenty-eight thousand, nine hundred forty-seven".