228427823861 has 2 divisors, whose sum is σ = 228427823862. Its totient is φ = 228427823860.

The previous prime is 228427823831. The next prime is 228427823879. The reversal of 228427823861 is 168328724822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210021474961 + 18406348900 = 458281^2 + 135670^2 .

It is a cyclic number.

It is not a de Polignac number, because 228427823861 - 2⁶ = 228427823797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228427823831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114213911930 + 114213911931.

It is an arithmetic number, because the mean of its divisors is an integer number (114213911931).

Almost surely, 2^228427823861 is an apocalyptic number.

It is an amenable number.

228427823861 is a deficient number, since it is larger than the sum of its proper divisors (1).

228427823861 is an equidigital number, since it uses as much as digits as its factorization.

228427823861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4128768, while the sum is 53.

The spelling of 228427823861 in words is "two hundred twenty-eight billion, four hundred twenty-seven million, eight hundred twenty-three thousand, eight hundred sixty-one".