228181823 has 2 divisors, whose sum is σ = 228181824. Its totient is φ = 228181822.

The previous prime is 228181817. The next prime is 228181847. The reversal of 228181823 is 328181822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228181823 - 2⁸ = 228181567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228184823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114090911 + 114090912.

It is an arithmetic number, because the mean of its divisors is an integer number (114090912).

Almost surely, 2^228181823 is an apocalyptic number.

228181823 is a deficient number, since it is larger than the sum of its proper divisors (1).

228181823 is an equidigital number, since it uses as much as digits as its factorization.

228181823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12288, while the sum is 35.

The square root of 228181823 is about 15105.6884318458. The cubic root of 228181823 is about 611.0738256615.

Subtracting 228181823 from its reverse (328181822), we obtain a palindrome (99999999).

The spelling of 228181823 in words is "two hundred twenty-eight million, one hundred eighty-one thousand, eight hundred twenty-three".