101720228 has 12 divisors (see below), whose sum is σ = 178574172. Its totient is φ = 50699040.

The previous prime is 101720219. The next prime is 101720239. The reversal of 101720228 is 822027101.

It can be written as a sum of positive squares in 2 ways, for example, as 23892544 + 77827684 = 4888^2 + 8822^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38843 + ... + 41378.

It is an arithmetic number, because the mean of its divisors is an integer number (14881181).

Almost surely, 2^101720228 is an apocalyptic number.

It is an amenable number.

101720228 is a deficient number, since it is larger than the sum of its proper divisors (76853944).

101720228 is a wasteful number, since it uses less digits than its factorization.

101720228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80542 (or 80540 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 101720228 is about 10085.6446496989. The cubic root of 101720228 is about 466.8052964557.

Adding to 101720228 its reverse (822027101), we get a palindrome (923747329).

The spelling of 101720228 in words is "one hundred one million, seven hundred twenty thousand, two hundred twenty-eight".