228226997 has 2 divisors, whose sum is σ = 228226998. Its totient is φ = 228226996.

The previous prime is 228226961. The next prime is 228227011. The reversal of 228226997 is 799622822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227828836 + 398161 = 15094^2 + 631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228226997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228225997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114113498 + 114113499.

It is an arithmetic number, because the mean of its divisors is an integer number (114113499).

Almost surely, 2^228226997 is an apocalyptic number.

It is an amenable number.

228226997 is a deficient number, since it is larger than the sum of its proper divisors (1).

228226997 is an equidigital number, since it uses as much as digits as its factorization.

228226997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 228226997 is about 15107.1836223699. The cubic root of 228226997 is about 611.1141485163.

The spelling of 228226997 in words is "two hundred twenty-eight million, two hundred twenty-six thousand, nine hundred ninety-seven".