228523657 has 2 divisors, whose sum is σ = 228523658. Its totient is φ = 228523656.

The previous prime is 228523649. The next prime is 228523663. The reversal of 228523657 is 756325822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189035001 + 39488656 = 13749^2 + 6284^2 .

It is a cyclic number.

It is not a de Polignac number, because 228523657 - 2³ = 228523649 is a prime.

It is not a weakly prime, because it can be changed into another prime (228523637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114261828 + 114261829.

It is an arithmetic number, because the mean of its divisors is an integer number (114261829).

Almost surely, 2^228523657 is an apocalyptic number.

It is an amenable number.

228523657 is a deficient number, since it is larger than the sum of its proper divisors (1).

228523657 is an equidigital number, since it uses as much as digits as its factorization.

228523657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

The square root of 228523657 is about 15116.9989415889. The cubic root of 228523657 is about 611.3788186784.

The spelling of 228523657 in words is "two hundred twenty-eight million, five hundred twenty-three thousand, six hundred fifty-seven".