228835213 has 2 divisors, whose sum is σ = 228835214. Its totient is φ = 228835212.

The previous prime is 228835177. The next prime is 228835237. The reversal of 228835213 is 312538822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129095044 + 99740169 = 11362^2 + 9987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228835213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228835613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114417606 + 114417607.

It is an arithmetic number, because the mean of its divisors is an integer number (114417607).

Almost surely, 2^228835213 is an apocalyptic number.

It is an amenable number.

228835213 is a deficient number, since it is larger than the sum of its proper divisors (1).

228835213 is an equidigital number, since it uses as much as digits as its factorization.

228835213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 34.

The square root of 228835213 is about 15127.3002548373. The cubic root of 228835213 is about 611.6565320738.

The spelling of 228835213 in words is "two hundred twenty-eight million, eight hundred thirty-five thousand, two hundred thirteen".