228308357 has 2 divisors, whose sum is σ = 228308358. Its totient is φ = 228308356.

The previous prime is 228308321. The next prime is 228308363. The reversal of 228308357 is 753803822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227677921 + 630436 = 15089^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 228308357 - 2⁶ = 228308293 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228308357.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228308057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114154178 + 114154179.

It is an arithmetic number, because the mean of its divisors is an integer number (114154179).

Almost surely, 2^228308357 is an apocalyptic number.

It is an amenable number.

228308357 is a deficient number, since it is larger than the sum of its proper divisors (1).

228308357 is an equidigital number, since it uses as much as digits as its factorization.

228308357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 228308357 is about 15109.8761411204. The cubic root of 228308357 is about 611.1867580099.

The spelling of 228308357 in words is "two hundred twenty-eight million, three hundred eight thousand, three hundred fifty-seven".