228143266 has 8 divisors (see below), whose sum is σ = 368539164. Its totient is φ = 105296880.

The previous prime is 228143263. The next prime is 228143297. The reversal of 228143266 is 662341822.

It can be written as a sum of positive squares in 2 ways, for example, as 177662241 + 50481025 = 13329^2 + 7105^2 .

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

It is a super-2 number, since 2×228143266² = 104098699642293512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228143263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4387345 + ... + 4387396.

Almost surely, 2^228143266 is an apocalyptic number.

228143266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

228143266 is a deficient number, since it is larger than the sum of its proper divisors (140395898).

228143266 is a wasteful number, since it uses less digits than its factorization.

228143266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8774756.

The product of its digits is 27648, while the sum is 34.

The square root of 228143266 is about 15104.4121368559. The cubic root of 228143266 is about 611.0394050105.

The spelling of 228143266 in words is "two hundred twenty-eight million, one hundred forty-three thousand, two hundred sixty-six".