228165678251 has 16 divisors (see below), whose sum is σ = 261439938240. Its totient is φ = 195061426560.

The previous prime is 228165678229. The next prime is 228165678277. The reversal of 228165678251 is 152876561822.

It is a happy number.

It is not a de Polignac number, because 228165678251 - 2¹⁰ = 228165677227 is a prime.

It is a super-3 number, since 3×228165678251³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228165678193 and 228165678202.

It is not an unprimeable number, because it can be changed into a prime (228165678151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23208605 + ... + 23218433.

It is an arithmetic number, because the mean of its divisors is an integer number (16339996140).

Almost surely, 2^228165678251 is an apocalyptic number.

228165678251 is a deficient number, since it is larger than the sum of its proper divisors (33274259989).

228165678251 is an equidigital number, since it uses as much as digits as its factorization.

228165678251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18134.

The product of its digits is 3225600, while the sum is 53.

The spelling of 228165678251 in words is "two hundred twenty-eight billion, one hundred sixty-five million, six hundred seventy-eight thousand, two hundred fifty-one".