102220555 has 4 divisors (see below), whose sum is σ = 122664672. Its totient is φ = 81776440.

The previous prime is 102220553. The next prime is 102220571. The reversal of 102220555 is 555022201.

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

It is not a de Polignac number, because 102220555 - 2¹ = 102220553 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102220553) 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, 10222051 + ... + 10222060.

It is an arithmetic number, because the mean of its divisors is an integer number (30666168).

Almost surely, 2^102220555 is an apocalyptic number.

102220555 is a deficient number, since it is larger than the sum of its proper divisors (20444117).

102220555 is an equidigital number, since it uses as much as digits as its factorization.

102220555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20444116.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 102220555 is about 10110.4181416992. The cubic root of 102220555 is about 467.5693968873.

Adding to 102220555 its reverse (555022201), we get a palindrome (657242756).

The spelling of 102220555 in words is "one hundred two million, two hundred twenty thousand, five hundred fifty-five".