103221144 has 144 divisors (see below), whose sum is σ = 321165000. Its totient is φ = 29832192.

The previous prime is 103221109. The next prime is 103221169. The reversal of 103221144 is 441122301.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 206607 + ... + 207105.

Almost surely, 2^103221144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 103221144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160582500).

103221144 is an abundant number, since it is smaller than the sum of its proper divisors (217943856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

103221144 is a wasteful number, since it uses less digits than its factorization.

103221144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 103221144 is about 10159.7807062948. The cubic root of 103221144 is about 469.0900517053.

Adding to 103221144 its reverse (441122301), we get a palindrome (544343445).

The spelling of 103221144 in words is "one hundred three million, two hundred twenty-one thousand, one hundred forty-four".