228782101 has 4 divisors (see below), whose sum is σ = 228925900. Its totient is φ = 228638304.

The previous prime is 228782087. The next prime is 228782111. The reversal of 228782101 is 101287822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104571076 + 124211025 = 10226^2 + 11145^2 .

It is a cyclic number.

It is not a de Polignac number, because 228782101 - 2⁹ = 228781589 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228782111) 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 3 ways as a sum of consecutive naturals, for example, 69486 + ... + 72703.

It is an arithmetic number, because the mean of its divisors is an integer number (57231475).

Almost surely, 2^228782101 is an apocalyptic number.

It is an amenable number.

228782101 is a deficient number, since it is larger than the sum of its proper divisors (143799).

228782101 is a wasteful number, since it uses less digits than its factorization.

228782101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143798.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 228782101 is about 15125.5446513506. The cubic root of 228782101 is about 611.6092071671.

The spelling of 228782101 in words is "two hundred twenty-eight million, seven hundred eighty-two thousand, one hundred one".