228518971 has 2 divisors, whose sum is σ = 228518972. Its totient is φ = 228518970.

The previous prime is 228518963. The next prime is 228519001. The reversal of 228518971 is 179815822.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228518971 - 2³ = 228518963 is a prime.

It is a super-4 number, since 4×228518971⁴ (a number of 35 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (228518921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114259485 + 114259486.

It is an arithmetic number, because the mean of its divisors is an integer number (114259486).

Almost surely, 2^228518971 is an apocalyptic number.

228518971 is a deficient number, since it is larger than the sum of its proper divisors (1).

228518971 is an equidigital number, since it uses as much as digits as its factorization.

228518971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 43.

The square root of 228518971 is about 15116.8439497138. The cubic root of 228518971 is about 611.3746397665.

The spelling of 228518971 in words is "two hundred twenty-eight million, five hundred eighteen thousand, nine hundred seventy-one".