228093661 has 4 divisors (see below), whose sum is σ = 231498112. Its totient is φ = 224689212.

The previous prime is 228093659. The next prime is 228093667. The reversal of 228093661 is 166390822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228093661 - 2¹ = 228093659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228093661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228093667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1702125 + ... + 1702258.

It is an arithmetic number, because the mean of its divisors is an integer number (57874528).

Almost surely, 2^228093661 is an apocalyptic number.

It is an amenable number.

228093661 is a deficient number, since it is larger than the sum of its proper divisors (3404451).

228093661 is an equidigital number, since it uses as much as digits as its factorization.

228093661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404450.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 228093661 is about 15102.7699777226. The cubic root of 228093661 is about 610.9951158710.

The spelling of 228093661 in words is "two hundred twenty-eight million, ninety-three thousand, six hundred sixty-one".