228539957 has 2 divisors, whose sum is σ = 228539958. Its totient is φ = 228539956.

The previous prime is 228539953. The next prime is 228540007. The reversal of 228539957 is 759935822.

It is an a-pointer prime, because the next prime (228540007) can be obtained adding 228539957 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224070961 + 4468996 = 14969^2 + 2114^2 .

It is a cyclic number.

It is not a de Polignac number, because 228539957 - 2² = 228539953 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228539953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114269978 + 114269979.

It is an arithmetic number, because the mean of its divisors is an integer number (114269979).

Almost surely, 2^228539957 is an apocalyptic number.

It is an amenable number.

228539957 is a deficient number, since it is larger than the sum of its proper divisors (1).

228539957 is an equidigital number, since it uses as much as digits as its factorization.

228539957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 50.

The square root of 228539957 is about 15117.5380601472. The cubic root of 228539957 is about 611.3933543549.

The spelling of 228539957 in words is "two hundred twenty-eight million, five hundred thirty-nine thousand, nine hundred fifty-seven".