108224721 has 16 divisors (see below), whose sum is σ = 174909120. Its totient is φ = 65590560.

The previous prime is 108224719. The next prime is 108224759. The reversal of 108224721 is 127422801.

It is not a de Polignac number, because 108224721 - 2¹ = 108224719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (108224761) 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 15 ways as a sum of consecutive naturals, for example, 181900 + ... + 182493.

It is an arithmetic number, because the mean of its divisors is an integer number (10931820).

Almost surely, 2^108224721 is an apocalyptic number.

108224721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

108224721 is a deficient number, since it is larger than the sum of its proper divisors (66684399).

108224721 is a wasteful number, since it uses less digits than its factorization.

108224721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364413 (or 364407 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 108224721 is about 10403.1111211983. Note that the first 4 decimals coincide. The cubic root of 108224721 is about 476.5503852393.

The spelling of 108224721 in words is "one hundred eight million, two hundred twenty-four thousand, seven hundred twenty-one".