228017557 has 2 divisors, whose sum is σ = 228017558. Its totient is φ = 228017556.

The previous prime is 228017513. The next prime is 228017563. The reversal of 228017557 is 755710822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180875601 + 47141956 = 13449^2 + 6866^2 .

It is a cyclic number.

It is not a de Polignac number, because 228017557 - 2⁷ = 228017429 is a prime.

It is a super-3 number, since 3×228017557³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228017567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114008778 + 114008779.

It is an arithmetic number, because the mean of its divisors is an integer number (114008779).

Almost surely, 2^228017557 is an apocalyptic number.

It is an amenable number.

228017557 is a deficient number, since it is larger than the sum of its proper divisors (1).

228017557 is an equidigital number, since it uses as much as digits as its factorization.

228017557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 228017557 is about 15100.2502297147. The cubic root of 228017557 is about 610.9271549808.

The spelling of 228017557 in words is "two hundred twenty-eight million, seventeen thousand, five hundred fifty-seven".