228117937 has 2 divisors, whose sum is σ = 228117938. Its totient is φ = 228117936.

The previous prime is 228117899. The next prime is 228117941. The reversal of 228117937 is 739711822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214212496 + 13905441 = 14636^2 + 3729^2 .

It is a cyclic number.

It is not a de Polignac number, because 228117937 - 2¹⁹ = 227593649 is a prime.

It is a super-2 number, since 2×228117937² = 104075586362271938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228117937.

It is not a weakly prime, because it can be changed into another prime (228117037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114058968 + 114058969.

It is an arithmetic number, because the mean of its divisors is an integer number (114058969).

Almost surely, 2^228117937 is an apocalyptic number.

It is an amenable number.

228117937 is a deficient number, since it is larger than the sum of its proper divisors (1).

228117937 is an equidigital number, since it uses as much as digits as its factorization.

228117937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 228117937 is about 15103.5736499677. The cubic root of 228117937 is about 611.0167911647.

The spelling of 228117937 in words is "two hundred twenty-eight million, one hundred seventeen thousand, nine hundred thirty-seven".