228279131 has 8 divisors (see below), whose sum is σ = 233916144. Its totient is φ = 222657120.

The previous prime is 228279119. The next prime is 228279143. The reversal of 228279131 is 131972822.

It is an interprime number because it is at equal distance from previous prime (228279119) and next prime (228279143).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228279131 - 2¹⁴ = 228262747 is a prime.

It is a super-2 number, since 2×228279131² = 104222723300230322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 228279091 and 228279100.

It is not an unprimeable number, because it can be changed into a prime (228279101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30941 + ... + 37601.

It is an arithmetic number, because the mean of its divisors is an integer number (29239518).

Almost surely, 2^228279131 is an apocalyptic number.

228279131 is a deficient number, since it is larger than the sum of its proper divisors (5637013).

228279131 is an equidigital number, since it uses as much as digits as its factorization.

228279131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7501.

The product of its digits is 12096, while the sum is 35.

The square root of 228279131 is about 15108.9089943649. The cubic root of 228279131 is about 611.1606773375.

It can be divided in two parts, 2282791 and 31, that added together give a palindrome (2282822).

The spelling of 228279131 in words is "two hundred twenty-eight million, two hundred seventy-nine thousand, one hundred thirty-one".