228156823 has 2 divisors, whose sum is σ = 228156824. Its totient is φ = 228156822.

The previous prime is 228156811. The next prime is 228156871. The reversal of 228156823 is 328651822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228156823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228156893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114078411 + 114078412.

It is an arithmetic number, because the mean of its divisors is an integer number (114078412).

Almost surely, 2^228156823 is an apocalyptic number.

228156823 is a deficient number, since it is larger than the sum of its proper divisors (1).

228156823 is an equidigital number, since it uses as much as digits as its factorization.

228156823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

The square root of 228156823 is about 15104.8609063440. The cubic root of 228156823 is about 611.0515080737.

The spelling of 228156823 in words is "two hundred twenty-eight million, one hundred fifty-six thousand, eight hundred twenty-three".