102220145 has 8 divisors (see below), whose sum is σ = 122728704. Its totient is φ = 81733104.

The previous prime is 102220123. The next prime is 102220147. The reversal of 102220145 is 541022201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102220145 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102220147) 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, 8192 + ... + 16478.

It is an arithmetic number, because the mean of its divisors is an integer number (15341088).

Almost surely, 2^102220145 is an apocalyptic number.

It is an amenable number.

102220145 is a deficient number, since it is larger than the sum of its proper divisors (20508559).

102220145 is an equidigital number, since it uses as much as digits as its factorization.

102220145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10759.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 102220145 is about 10110.3978655639. The cubic root of 102220145 is about 467.5687717563.

Adding to 102220145 its reverse (541022201), we get a palindrome (643242346).

The spelling of 102220145 in words is "one hundred two million, two hundred twenty thousand, one hundred forty-five".