228902281 has 8 divisors (see below), whose sum is σ = 230912640. Its totient is φ = 226897392.

The previous prime is 228902257. The next prime is 228902299. The reversal of 228902281 is 182209822.

It is a happy number.

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 228902281 - 2¹⁹ = 228377993 is a prime.

It is a super-2 number, since 2×228902281² = 104792508494005922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228902251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152571 + ... + 154063.

It is an arithmetic number, because the mean of its divisors is an integer number (28864080).

Almost surely, 2^228902281 is an apocalyptic number.

It is an amenable number.

228902281 is a deficient number, since it is larger than the sum of its proper divisors (2010359).

228902281 is a wasteful number, since it uses less digits than its factorization.

228902281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 228902281 is about 15129.5168792662. The cubic root of 228902281 is about 611.7162818718.

The spelling of 228902281 in words is "two hundred twenty-eight million, nine hundred two thousand, two hundred eighty-one".