228378500993 has 2 divisors, whose sum is σ = 228378500994. Its totient is φ = 228378500992.

The previous prime is 228378500983. The next prime is 228378501023. The reversal of 228378500993 is 399005873822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128688647824 + 99689853169 = 358732^2 + 315737^2 .

It is a cyclic number.

It is not a de Polignac number, because 228378500993 - 2⁸ = 228378500737 is a prime.

It is not a weakly prime, because it can be changed into another prime (228378500983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114189250496 + 114189250497.

It is an arithmetic number, because the mean of its divisors is an integer number (114189250497).

Almost surely, 2^228378500993 is an apocalyptic number.

It is an amenable number.

228378500993 is a deficient number, since it is larger than the sum of its proper divisors (1).

228378500993 is an equidigital number, since it uses as much as digits as its factorization.

228378500993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 228378500993 in words is "two hundred twenty-eight billion, three hundred seventy-eight million, five hundred thousand, nine hundred ninety-three".