224126721 has 48 divisors (see below), whose sum is σ = 401681280. Its totient is φ = 117262080.

The previous prime is 224126719. The next prime is 224126729. The reversal of 224126721 is 127621422.

It is not a de Polignac number, because 224126721 - 2¹ = 224126719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (224126729) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106245 + ... + 108333.

It is an arithmetic number, because the mean of its divisors is an integer number (8368360).

Almost surely, 2^224126721 is an apocalyptic number.

224126721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

224126721 is a deficient number, since it is larger than the sum of its proper divisors (177554559).

224126721 is a wasteful number, since it uses less digits than its factorization.

224126721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2246 (or 2243 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 224126721 is about 14970.8624000089. The cubic root of 224126721 is about 607.4322964737.

The spelling of 224126721 in words is "two hundred twenty-four million, one hundred twenty-six thousand, seven hundred twenty-one".