228531617 has 2 divisors, whose sum is σ = 228531618. Its totient is φ = 228531616.

The previous prime is 228531607. The next prime is 228531631. The reversal of 228531617 is 716135822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135582736 + 92948881 = 11644^2 + 9641^2 .

It is a cyclic number.

It is not a de Polignac number, because 228531617 - 2⁸ = 228531361 is a prime.

It is not a weakly prime, because it can be changed into another prime (228531607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114265808 + 114265809.

It is an arithmetic number, because the mean of its divisors is an integer number (114265809).

Almost surely, 2^228531617 is an apocalyptic number.

It is an amenable number.

228531617 is a deficient number, since it is larger than the sum of its proper divisors (1).

228531617 is an equidigital number, since it uses as much as digits as its factorization.

228531617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 228531617 is about 15117.2622190660. The cubic root of 228531617 is about 611.3859171687.

The spelling of 228531617 in words is "two hundred twenty-eight million, five hundred thirty-one thousand, six hundred seventeen".