103821144 has 32 divisors (see below), whose sum is σ = 296632320. Its totient is φ = 29663136.

The previous prime is 103821121. The next prime is 103821169. The reversal of 103821144 is 441128301.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308824 + ... + 309159.

It is an arithmetic number, because the mean of its divisors is an integer number (9269760).

Almost surely, 2^103821144 is an apocalyptic number.

103821144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

103821144 is an abundant number, since it is smaller than the sum of its proper divisors (192811176).

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

103821144 is a wasteful number, since it uses less digits than its factorization.

103821144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617999 (or 617995 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 103821144 is about 10189.2661168506. The cubic root of 103821144 is about 469.9971993194.

Adding to 103821144 its reverse (441128301), we get a palindrome (544949445).

The spelling of 103821144 in words is "one hundred three million, eight hundred twenty-one thousand, one hundred forty-four".