228740557 has 2 divisors, whose sum is σ = 228740558. Its totient is φ = 228740556.

The previous prime is 228740539. The next prime is 228740579. The reversal of 228740557 is 755047822.

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., 151634596 + 77105961 = 12314^2 + 8781^2 .

It is a cyclic number.

It is not a de Polignac number, because 228740557 - 2¹⁵ = 228707789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228740507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114370278 + 114370279.

It is an arithmetic number, because the mean of its divisors is an integer number (114370279).

Almost surely, 2^228740557 is an apocalyptic number.

It is an amenable number.

228740557 is a deficient number, since it is larger than the sum of its proper divisors (1).

228740557 is an equidigital number, since it uses as much as digits as its factorization.

228740557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 228740557 is about 15124.1712830819. The cubic root of 228740557 is about 611.5721847034.

The spelling of 228740557 in words is "two hundred twenty-eight million, seven hundred forty thousand, five hundred fifty-seven".