228022657 has 2 divisors, whose sum is σ = 228022658. Its totient is φ = 228022656.

The previous prime is 228022643. The next prime is 228022699. The reversal of 228022657 is 756220822.

It is a happy number.

228022657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227376241 + 646416 = 15079^2 + 804^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228022657 is a prime.

It is not a weakly prime, because it can be changed into another prime (228022357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114011328 + 114011329.

It is an arithmetic number, because the mean of its divisors is an integer number (114011329).

Almost surely, 2^228022657 is an apocalyptic number.

It is an amenable number.

228022657 is a deficient number, since it is larger than the sum of its proper divisors (1).

228022657 is an equidigital number, since it uses as much as digits as its factorization.

228022657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 228022657 is about 15100.4191001442. The cubic root of 228022657 is about 610.9317097547.

The spelling of 228022657 in words is "two hundred twenty-eight million, twenty-two thousand, six hundred fifty-seven".