228387811 has 2 divisors, whose sum is σ = 228387812. Its totient is φ = 228387810.

The previous prime is 228387799. The next prime is 228387821. The reversal of 228387811 is 118783822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228387811 - 2⁵ = 228387779 is a prime.

It is not a weakly prime, because it can be changed into another prime (228387821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114193905 + 114193906.

It is an arithmetic number, because the mean of its divisors is an integer number (114193906).

Almost surely, 2^228387811 is an apocalyptic number.

228387811 is a deficient number, since it is larger than the sum of its proper divisors (1).

228387811 is an equidigital number, since it uses as much as digits as its factorization.

228387811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 40.

The square root of 228387811 is about 15112.5051199330. The cubic root of 228387811 is about 611.2576498528.

The spelling of 228387811 in words is "two hundred twenty-eight million, three hundred eighty-seven thousand, eight hundred eleven".